diff --git a/CommonLogic/Debugger/Diagrams/Flow.php b/CommonLogic/Debugger/Diagrams/Flow.php
new file mode 100644
index 000000000..a7461a698
--- /dev/null
+++ b/CommonLogic/Debugger/Diagrams/Flow.php
@@ -0,0 +1,187 @@
+<?php
+
+namespace Exface\Core\CommonLogic\Debugger\Diagrams;
+use exface\Core\Exceptions\InvalidArgumentException;
+use exface\Core\Exceptions\UnexpectedValueException;
+use exface\Core\Interfaces\Diagrams\FlowInterface;
+
+// below you find an example of the syntax and the writing style when applying the methods that you find in this Flow.php. The example is a flowchart that can be generated in PowerUI
+// $diagram->addNodeStart('Task input');
+// $diagram->continue('Collect task data', 'suedlink.Trasse.Baufelduebergabe',  FlowNode::STYLE_DATA)
+//         ->continue('Refresh all data', 'suedlink.Trasse.Baufelduebergabe', FlowNode::STYLE_DATA)
+//         ->addNodeEnd('Prefill data', 'suedlink.Trasse.Baufelduebergabe');
+// 
+// $diagram->addNodeStart('Task prefill');
+// $diagram->continue('Collect task data', 'No data', FlowNode::STYLE_DATA);
+
+//core structure and functionality for any type of flowchart
+//abstract -> common functionality that can be reused by any specific type of flowchart AND allows subclasses to implement their own specific rendering logic while still reusing the core flowchart
+
+abstract class Flow implements FlowInterface
+{
+    // holds all the nodes in the flowchart
+    protected $nodes = [];
+    // holds all the links between the nodes
+    protected $links = [];
+    // reference to the last node added
+    protected $lastNode = null;
+    
+    /**
+     * Summary of addNodeStart
+     * @param mixed $nodeOrTitle
+     * @param mixed $stringOrStyle
+     * @return \Exface\Core\CommonLogic\Debugger\Diagrams\FlowNode
+     */
+    public function addNodeStart($nodeOrTitle, $stringOrStyle = null): FlowNode
+    {
+        $node = $this->addNode($nodeOrTitle, $stringOrStyle);
+        $this->setNodeLast($node);
+        return $node;
+    }
+
+    /**
+     * 
+     * @param string|FlowNode $nodeOrTitle
+     * @param string|object $linkTitleOrObject
+     * @throws \exface\Core\Exceptions\InvalidArgumentException
+     * @return \Exface\Core\CommonLogic\Debugger\Diagrams\Flow
+     */
+    public function continue($nodeOrTitle, $linkTitleOrObject, $stringOrStyle = null): self
+    {
+        $toNode = $this->addNode($nodeOrTitle, $stringOrStyle);
+        
+        if (null !== $fromNode = $this->getNodeLast()) {
+            $this->addLink($fromNode, $toNode, FlowLink::getTitleForAnything($linkTitleOrObject));
+        }
+        $this->setNodeLast($toNode);
+        return $this;
+    }
+    
+    /**
+     * Summary of addNodeEnd
+     * @param mixed $nodeOrTitle
+     * @param mixed $linkTitleOrObject
+     * @param mixed $stringOrStyle
+     * @return \Exface\Core\CommonLogic\Debugger\Diagrams\Flow
+     */
+    public function addNodeEnd($nodeOrTitle, $linkTitleOrObject, $stringOrStyle = null): self
+    {
+        $toNode = $this->addNode($nodeOrTitle, $stringOrStyle);
+        
+        if (null !== $fromNode = $this->getNodeLast()) {
+            $this->addLink($fromNode, $toNode, FlowLink::getTitleForAnything($linkTitleOrObject));
+    }
+    $this->setNodeLast($toNode);
+    return $this;
+}
+
+    protected function getNodeLast() : ?FlowNode
+    {
+        return $this->lastNode ?? ($this->nodes[array_key_first($this->nodes)] ?? null);
+    }
+
+    protected function setNodeLast(FlowNode $node): Flow
+    {
+        $this->lastNode = $node;
+        return $this;
+    }
+
+    /**
+     * 
+     * @param \Exface\Core\CommonLogic\Debugger\Diagrams\FlowNode $from
+     * @param \Exface\Core\CommonLogic\Debugger\Diagrams\FlowNode $to
+     * @param string $title
+     * @return \Exface\Core\CommonLogic\Debugger\Diagrams\Flow
+     */
+    public function addLink($from, $to, $titleOrObject): self
+    {
+        switch (true) {
+            case $from instanceof FlowNode:
+                $fromNode = $from;
+                break;
+            case is_string($from):
+                $fromNode = $this->findNode($from);
+                if ($fromNode === null) {
+                    $valueDescription = ($from === '') ? '"blank"' : $from;
+                    throw new UnexpectedValueException('The filled in value of ' . $valueDescription . ' is invalid. Please use one of the already assigned titles for nodes');
+                }
+                break;
+            default: throw new InvalidArgumentException('Cannot continue flowchart: expecting string or node instance, received ' . gettype($from));
+        }
+
+        switch (true) {
+            case $to instanceof FlowNode:
+                $toNode = $to;
+                break;
+            case is_string($to):
+                $toNode = $this->findNode($to);
+                if ($fromNode === null) {
+                    $valueDescription = ($to === '') ? '"blank"' : $to;
+                    throw new UnexpectedValueException('The filled in value of ' . $valueDescription . ' is invalid. Please use one of the already assigned titles for nodes');
+                }
+                break;
+            default: throw new InvalidArgumentException('Cannot continue flowchart: expecting string or node instance, received ' . gettype($to));
+        }
+        $link = new FlowLink($fromNode, $toNode, FlowLink::getTitleForAnything($titleOrObject));
+        $this->links[] = $link;
+        return $this;
+    }
+
+    /**
+     * Summary of addNode
+     * @param mixed $nodeOrTitle
+     * @param mixed $stringOrStyle
+     * @throws \exface\Core\Exceptions\InvalidArgumentException
+     * @return \Exface\Core\CommonLogic\Debugger\Diagrams\FlowNode
+     */
+    public function addNode($nodeOrTitle, $stringOrStyle = null) : FlowNode
+    {
+        switch (true) {
+            case $nodeOrTitle instanceof FlowNode:
+                $toNode = $nodeOrTitle;
+                break;
+            case is_string($nodeOrTitle):
+                $toNode = new FlowNode($nodeOrTitle, $stringOrStyle);
+                break;
+            default:
+                throw new InvalidArgumentException('Cannot continue flowchart: expecting string or node instance, received ' . get_class($nodeOrTitle));
+        }
+        $this->nodes[] = $toNode;
+        return $toNode;
+    }
+
+    /**
+     * 
+     * @param mixed $title
+     * @return FlowNode|null
+     */
+    protected function findNode($title) : ?FlowNode
+    {
+        foreach ($this->nodes as $node) {
+            if ($node->getTitle() === $title) {
+                return $node;
+            }
+        }
+        return null;
+    }
+
+    abstract public function render() : string;
+
+    /**
+     * Summary of getNodes
+     * @return FlowNode[]
+     */
+    public function getNodes() : array
+    {
+        return $this->nodes;
+    }
+
+    /**
+     *  
+     * @return FlowLink[]
+     */
+    public function getLinks() : array
+    {
+        return $this->links;
+    }
+}
\ No newline at end of file
diff --git a/CommonLogic/Debugger/Diagrams/FlowLink.php b/CommonLogic/Debugger/Diagrams/FlowLink.php
new file mode 100644
index 000000000..d2b7e5864
--- /dev/null
+++ b/CommonLogic/Debugger/Diagrams/FlowLink.php
@@ -0,0 +1,70 @@
+<?php
+
+namespace Exface\Core\CommonLogic\Debugger\Diagrams;
+use exface\Core\Interfaces\DataSheets\DataSheetInterface;
+
+// represents link between two nodes, references to the start and end nodes
+class FlowLink
+{
+    protected $from;
+    protected $to;
+    protected $title;
+
+    public function __construct(FlowNode $from, FlowNode $to, string $title)
+    {
+        $this->from = $from;
+        $this->to = $to;
+        $this->title = $title;
+    }
+
+    // returns starting node
+    public function getNodeFrom(): FlowNode
+    {
+        return $this->from;
+    }
+
+    // returns ending node
+    public function getNodeTo(): FlowNode
+    {
+        return $this->to;
+    }
+
+    // returns title of the link
+    public function getTitle(): string
+    {
+        return $this->title;
+    }
+
+    /**
+     * 
+     * @param string|object $something
+     * @return string
+     */
+    public static function getTitleForAnything($something) : string
+    {
+        $str = '';
+        switch (true) {
+            case $something instanceof DataSheetInterface:
+                $dataSheet = $something;
+                $obj = $dataSheet->getMetaObject()->getAliasWithNamespace();
+                $rows = $dataSheet->countRows();
+                $cols = $dataSheet->getColumns()->count();
+                $filters = $dataSheet->getFilters()->countConditions() + $dataSheet->getFilters()->countNestedGroups();
+                if (empty($rows) && empty($cols) && empty($filters)) {
+                    return "\"{$obj}\nblank\"";
+                }
+                $str = "\"{$obj}\n{$rows} row(s), {$cols} col(s), {$filters} filter(s)\"";
+                break;
+            case is_string($something):
+                $str = $something;
+                break;
+            case $something instanceof \Stringable:
+                $str = $something->__toString();
+                break;
+            default:
+            $str =  get_class($something);
+                break;
+        }
+        return $str;
+    }
+}
diff --git a/CommonLogic/Debugger/Diagrams/FlowLinkStyle.php b/CommonLogic/Debugger/Diagrams/FlowLinkStyle.php
new file mode 100644
index 000000000..66274e096
--- /dev/null
+++ b/CommonLogic/Debugger/Diagrams/FlowLinkStyle.php
@@ -0,0 +1,43 @@
+<?php
+
+namespace Exface\Core\CommonLogic\Debugger\Diagrams;
+
+// This class is not in use / applied - starting point for implementing e.g. dotted lines
+// holds style properties how a link should be visually represented
+class FlowLinkStyle
+{
+    private $name;   // name of style
+    private $color; // get color
+    private $arrow;  // arrow type
+    private $weight; // weight or thickness of the link
+
+    public function __construct(string $name, string $stroke, string $arrow = null, string $weight)
+    {
+        $this->name = $name;
+        $this->stroke = $stroke;
+        $this->arrow = $arrow;
+        $this->weight = $weight;
+    }
+
+    // getter methods to retrieve the style properties
+    public function getName(): string
+    {
+        return $this->name;
+    }
+
+    public function getStroke(): string
+    {
+        return $this->color;
+    }
+
+    public function getArrow(): string
+    {
+        return $this->arrow;
+    }
+
+    public function getWeight(): string
+    {
+        return $this->weight;
+    }
+
+}
diff --git a/CommonLogic/Debugger/Diagrams/FlowNode.php b/CommonLogic/Debugger/Diagrams/FlowNode.php
new file mode 100644
index 000000000..7b435d0fd
--- /dev/null
+++ b/CommonLogic/Debugger/Diagrams/FlowNode.php
@@ -0,0 +1,62 @@
+<?php
+
+namespace Exface\Core\CommonLogic\Debugger\Diagrams;
+
+class FlowNode
+{
+    const STYLE_SQUARE = 'square';
+
+    const STYLE_ROUND = 'round';
+
+    const STYLE_PROCESS = 'process';
+
+    const STYLE_DATA = 'data';
+
+    const STYLE_ERROR = 'error';
+
+    protected $title; // Node title
+    protected $style; // Node style, instance of FlowChartNodeStyle
+
+    public function __construct(string $title = null, $style = null)
+    {
+        $this->title = $title;
+        $this->style = $style;
+    }
+
+    // returns title of node
+    public function getTitle(): string
+    {
+        return $this->title;
+    }
+
+    // returns style of node
+    public function getStyle(): ?FlowNodeStyle
+    {
+        if (is_string($this->style)) {
+            $this->style = $this->getStyleFromPreset($this->style);
+        }
+        return $this->style;
+    }
+
+    /**
+     * Summary of getStyleFromPreset
+     * @param string $preset
+     * @return FlowNodeStyle
+     */
+    protected function getStyleFromPreset(string $preset): ?FlowNodeStyle
+    {
+        switch ($preset) {
+            case self::STYLE_SQUARE:
+            case self::STYLE_DATA:
+                $style = new FlowNodeStyle($preset, FlowNodeStyle::SHAPE_SQUARE);
+                break;
+            case self::STYLE_ROUND:
+            case self::STYLE_PROCESS:
+                $style = new FlowNodeStyle($preset, FlowNodeStyle::SHAPE_ROUND);
+                break;
+            case self::STYLE_ERROR:
+                $style = new FlowNodeStyle($preset, FlowNodeStyle::SHAPE_SQUARE, 'red');
+        }
+        return $style;
+    }
+}
diff --git a/CommonLogic/Debugger/Diagrams/FlowNodeStyle.php b/CommonLogic/Debugger/Diagrams/FlowNodeStyle.php
new file mode 100644
index 000000000..1627221bd
--- /dev/null
+++ b/CommonLogic/Debugger/Diagrams/FlowNodeStyle.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace Exface\Core\CommonLogic\Debugger\Diagrams;
+
+// holds style properties how a node should be visually represented
+class FlowNodeStyle
+{
+    const SHAPE_SQUARE = 'square';
+    const SHAPE_ROUND = 'round';
+
+    public $name;   // name of style
+    public $shape;  // shape of node (e.g. square, round)
+    public $color;  // color of node
+
+    public function __construct(string $name, string $shape = null, string $color = null)
+    {
+        $this->name = $name;
+        $this->shape = $shape;
+        $this->color = $color;
+    }
+
+    // getter methods to retrieve the style properties
+    public function getName(): string
+    {
+        return $this->name;
+    }
+
+    public function getShape(): ?string
+    {
+        return $this->shape;
+    }
+
+    public function getColor(): ?string
+    {
+        return $this->color;
+    }
+}
diff --git a/CommonLogic/Debugger/Diagrams/MermaidFlow.php b/CommonLogic/Debugger/Diagrams/MermaidFlow.php
new file mode 100644
index 000000000..ccdfca8f4
--- /dev/null
+++ b/CommonLogic/Debugger/Diagrams/MermaidFlow.php
@@ -0,0 +1,91 @@
+<?php
+namespace exface\Core\CommonLogic\Debugger\Diagrams;
+
+use exface\Core\Interfaces\Diagrams\FlowInterface;
+use JBZoo\MermaidPHP\Graph;
+use JBZoo\MermaidPHP\Link;
+use JBZoo\MermaidPHP\Node;
+
+// renders the flowchart in Mermaid.js syntax
+class MermaidFlow
+{
+    /**
+     * Summary of render
+     * @param \exface\Core\Interfaces\Diagrams\FlowInterface $flowChart
+     * @return string
+     */
+    // takes the FlowInterface object and converts nodes and links into Mermaid.js
+    public function render(FlowInterface $flowChart) : string
+    {
+        $graph = new Graph(['direction' => Graph::LEFT_RIGHT]);
+        
+        foreach ($flowChart->getLinks() as $link) {
+            $from = $this->addNode($link->getNodeFrom(), $graph);
+            $to = $this->addNode($link->getNodeTo(), $graph);
+            $graphLink = new Link($from, $to, $link->getTitle());
+            $graph->addLink($graphLink);
+        }
+        return $graph->render();
+    }
+
+    /**
+     * Summary of addNode
+     * @param \exface\Core\CommonLogic\Debugger\Diagrams\FlowNode $node
+     * @param \JBZoo\MermaidPHP\Graph $graph
+     * @return \JBZoo\MermaidPHP\Node
+     */
+    protected function addNode(FlowNode $node, Graph $graph) : Node
+    {
+        $graphNode = new Node($this->getNodeId($node), $node->getTitle(), $this->getNodeForm($node->getStyle()));
+        $graph->addNode($graphNode); 
+        if ($style = $this->getNodeStyle($node->getStyle())) {
+            $graph->addStyle('style ' . $this->getNodeId($node) . ' ' . $style);
+        }
+        return $graphNode; 
+    }
+
+    /**
+     * Summary of getNodeStyle
+     * @param \exface\Core\CommonLogic\Debugger\Diagrams\FlowNodeStyle|null $nodeStyle
+     * @return string
+     */
+    protected function getNodeStyle(FlowNodeStyle $nodeStyle = null) : string
+    {
+        if ($nodeStyle === null) {
+            return '';
+        }
+        switch (true) {
+            case $nodeStyle->getColor() === 'red':
+                return 'fill:#ef4444,stroke:#ef4444';
+        }
+        return '';
+    }
+
+    /**
+     * Summary of getNodeForm
+     * @param \exface\Core\CommonLogic\Debugger\Diagrams\FlowNodeStyle|null $style
+     * @return string
+     */
+    protected function getNodeForm(FlowNodeStyle $style = null) : string
+    {
+        if ($style === null) {
+            return Node::ROUND;
+        }
+        switch ($style->getShape()) {
+            case FlowNodeStyle::SHAPE_SQUARE: 
+                $form = Node::SQUARE;
+                break;
+            case FlowNodeStyle::SHAPE_ROUND: 
+                $form = Node::ROUND;
+                break;
+            default:
+                $form = Node::ROUND;
+        }
+        return $form;
+    }
+
+    protected function getNodeId(FlowNode $node) :string
+    {
+        return str_replace(' ', '_', $node->getTitle());
+    }
+}
\ No newline at end of file
diff --git a/Interfaces/Diagrams/FlowInterface.php b/Interfaces/Diagrams/FlowInterface.php
new file mode 100644
index 000000000..04319f2e7
--- /dev/null
+++ b/Interfaces/Diagrams/FlowInterface.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace Exface\Core\Interfaces\Diagrams;
+
+//
+interface FlowInterface
+{
+    public function getLinks(): array;
+
+    public function getNodes(): array;
+}
diff --git a/vendor/autoload.php b/vendor/autoload.php
new file mode 100644
index 000000000..576c982d4
--- /dev/null
+++ b/vendor/autoload.php
@@ -0,0 +1,25 @@
+<?php
+
+// autoload.php @generated by Composer
+
+if (PHP_VERSION_ID < 50600) {
+    if (!headers_sent()) {
+        header('HTTP/1.1 500 Internal Server Error');
+    }
+    $err = 'Composer 2.3.0 dropped support for autoloading on PHP <5.6 and you are running '.PHP_VERSION.', please upgrade PHP or use Composer 2.2 LTS via "composer self-update --2.2". Aborting.'.PHP_EOL;
+    if (!ini_get('display_errors')) {
+        if (PHP_SAPI === 'cli' || PHP_SAPI === 'phpdbg') {
+            fwrite(STDERR, $err);
+        } elseif (!headers_sent()) {
+            echo $err;
+        }
+    }
+    trigger_error(
+        $err,
+        E_USER_ERROR
+    );
+}
+
+require_once __DIR__ . '/composer/autoload_real.php';
+
+return ComposerAutoloaderInite583d99b03ad449d5bb77b52da0c75ea::getLoader();
diff --git a/vendor/composer/ClassLoader.php b/vendor/composer/ClassLoader.php
new file mode 100644
index 000000000..7824d8f7e
--- /dev/null
+++ b/vendor/composer/ClassLoader.php
@@ -0,0 +1,579 @@
+<?php
+
+/*
+ * This file is part of Composer.
+ *
+ * (c) Nils Adermann <naderman@naderman.de>
+ *     Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Composer\Autoload;
+
+/**
+ * ClassLoader implements a PSR-0, PSR-4 and classmap class loader.
+ *
+ *     $loader = new \Composer\Autoload\ClassLoader();
+ *
+ *     // register classes with namespaces
+ *     $loader->add('Symfony\Component', __DIR__.'/component');
+ *     $loader->add('Symfony',           __DIR__.'/framework');
+ *
+ *     // activate the autoloader
+ *     $loader->register();
+ *
+ *     // to enable searching the include path (eg. for PEAR packages)
+ *     $loader->setUseIncludePath(true);
+ *
+ * In this example, if you try to use a class in the Symfony\Component
+ * namespace or one of its children (Symfony\Component\Console for instance),
+ * the autoloader will first look for the class under the component/
+ * directory, and it will then fallback to the framework/ directory if not
+ * found before giving up.
+ *
+ * This class is loosely based on the Symfony UniversalClassLoader.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Jordi Boggiano <j.boggiano@seld.be>
+ * @see    https://www.php-fig.org/psr/psr-0/
+ * @see    https://www.php-fig.org/psr/psr-4/
+ */
+class ClassLoader
+{
+    /** @var \Closure(string):void */
+    private static $includeFile;
+
+    /** @var string|null */
+    private $vendorDir;
+
+    // PSR-4
+    /**
+     * @var array<string, array<string, int>>
+     */
+    private $prefixLengthsPsr4 = array();
+    /**
+     * @var array<string, list<string>>
+     */
+    private $prefixDirsPsr4 = array();
+    /**
+     * @var list<string>
+     */
+    private $fallbackDirsPsr4 = array();
+
+    // PSR-0
+    /**
+     * List of PSR-0 prefixes
+     *
+     * Structured as array('F (first letter)' => array('Foo\Bar (full prefix)' => array('path', 'path2')))
+     *
+     * @var array<string, array<string, list<string>>>
+     */
+    private $prefixesPsr0 = array();
+    /**
+     * @var list<string>
+     */
+    private $fallbackDirsPsr0 = array();
+
+    /** @var bool */
+    private $useIncludePath = false;
+
+    /**
+     * @var array<string, string>
+     */
+    private $classMap = array();
+
+    /** @var bool */
+    private $classMapAuthoritative = false;
+
+    /**
+     * @var array<string, bool>
+     */
+    private $missingClasses = array();
+
+    /** @var string|null */
+    private $apcuPrefix;
+
+    /**
+     * @var array<string, self>
+     */
+    private static $registeredLoaders = array();
+
+    /**
+     * @param string|null $vendorDir
+     */
+    public function __construct($vendorDir = null)
+    {
+        $this->vendorDir = $vendorDir;
+        self::initializeIncludeClosure();
+    }
+
+    /**
+     * @return array<string, list<string>>
+     */
+    public function getPrefixes()
+    {
+        if (!empty($this->prefixesPsr0)) {
+            return call_user_func_array('array_merge', array_values($this->prefixesPsr0));
+        }
+
+        return array();
+    }
+
+    /**
+     * @return array<string, list<string>>
+     */
+    public function getPrefixesPsr4()
+    {
+        return $this->prefixDirsPsr4;
+    }
+
+    /**
+     * @return list<string>
+     */
+    public function getFallbackDirs()
+    {
+        return $this->fallbackDirsPsr0;
+    }
+
+    /**
+     * @return list<string>
+     */
+    public function getFallbackDirsPsr4()
+    {
+        return $this->fallbackDirsPsr4;
+    }
+
+    /**
+     * @return array<string, string> Array of classname => path
+     */
+    public function getClassMap()
+    {
+        return $this->classMap;
+    }
+
+    /**
+     * @param array<string, string> $classMap Class to filename map
+     *
+     * @return void
+     */
+    public function addClassMap(array $classMap)
+    {
+        if ($this->classMap) {
+            $this->classMap = array_merge($this->classMap, $classMap);
+        } else {
+            $this->classMap = $classMap;
+        }
+    }
+
+    /**
+     * Registers a set of PSR-0 directories for a given prefix, either
+     * appending or prepending to the ones previously set for this prefix.
+     *
+     * @param string              $prefix  The prefix
+     * @param list<string>|string $paths   The PSR-0 root directories
+     * @param bool                $prepend Whether to prepend the directories
+     *
+     * @return void
+     */
+    public function add($prefix, $paths, $prepend = false)
+    {
+        $paths = (array) $paths;
+        if (!$prefix) {
+            if ($prepend) {
+                $this->fallbackDirsPsr0 = array_merge(
+                    $paths,
+                    $this->fallbackDirsPsr0
+                );
+            } else {
+                $this->fallbackDirsPsr0 = array_merge(
+                    $this->fallbackDirsPsr0,
+                    $paths
+                );
+            }
+
+            return;
+        }
+
+        $first = $prefix[0];
+        if (!isset($this->prefixesPsr0[$first][$prefix])) {
+            $this->prefixesPsr0[$first][$prefix] = $paths;
+
+            return;
+        }
+        if ($prepend) {
+            $this->prefixesPsr0[$first][$prefix] = array_merge(
+                $paths,
+                $this->prefixesPsr0[$first][$prefix]
+            );
+        } else {
+            $this->prefixesPsr0[$first][$prefix] = array_merge(
+                $this->prefixesPsr0[$first][$prefix],
+                $paths
+            );
+        }
+    }
+
+    /**
+     * Registers a set of PSR-4 directories for a given namespace, either
+     * appending or prepending to the ones previously set for this namespace.
+     *
+     * @param string              $prefix  The prefix/namespace, with trailing '\\'
+     * @param list<string>|string $paths   The PSR-4 base directories
+     * @param bool                $prepend Whether to prepend the directories
+     *
+     * @throws \InvalidArgumentException
+     *
+     * @return void
+     */
+    public function addPsr4($prefix, $paths, $prepend = false)
+    {
+        $paths = (array) $paths;
+        if (!$prefix) {
+            // Register directories for the root namespace.
+            if ($prepend) {
+                $this->fallbackDirsPsr4 = array_merge(
+                    $paths,
+                    $this->fallbackDirsPsr4
+                );
+            } else {
+                $this->fallbackDirsPsr4 = array_merge(
+                    $this->fallbackDirsPsr4,
+                    $paths
+                );
+            }
+        } elseif (!isset($this->prefixDirsPsr4[$prefix])) {
+            // Register directories for a new namespace.
+            $length = strlen($prefix);
+            if ('\\' !== $prefix[$length - 1]) {
+                throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
+            }
+            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->prefixDirsPsr4[$prefix] = $paths;
+        } elseif ($prepend) {
+            // Prepend directories for an already registered namespace.
+            $this->prefixDirsPsr4[$prefix] = array_merge(
+                $paths,
+                $this->prefixDirsPsr4[$prefix]
+            );
+        } else {
+            // Append directories for an already registered namespace.
+            $this->prefixDirsPsr4[$prefix] = array_merge(
+                $this->prefixDirsPsr4[$prefix],
+                $paths
+            );
+        }
+    }
+
+    /**
+     * Registers a set of PSR-0 directories for a given prefix,
+     * replacing any others previously set for this prefix.
+     *
+     * @param string              $prefix The prefix
+     * @param list<string>|string $paths  The PSR-0 base directories
+     *
+     * @return void
+     */
+    public function set($prefix, $paths)
+    {
+        if (!$prefix) {
+            $this->fallbackDirsPsr0 = (array) $paths;
+        } else {
+            $this->prefixesPsr0[$prefix[0]][$prefix] = (array) $paths;
+        }
+    }
+
+    /**
+     * Registers a set of PSR-4 directories for a given namespace,
+     * replacing any others previously set for this namespace.
+     *
+     * @param string              $prefix The prefix/namespace, with trailing '\\'
+     * @param list<string>|string $paths  The PSR-4 base directories
+     *
+     * @throws \InvalidArgumentException
+     *
+     * @return void
+     */
+    public function setPsr4($prefix, $paths)
+    {
+        if (!$prefix) {
+            $this->fallbackDirsPsr4 = (array) $paths;
+        } else {
+            $length = strlen($prefix);
+            if ('\\' !== $prefix[$length - 1]) {
+                throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
+            }
+            $this->prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
+            $this->prefixDirsPsr4[$prefix] = (array) $paths;
+        }
+    }
+
+    /**
+     * Turns on searching the include path for class files.
+     *
+     * @param bool $useIncludePath
+     *
+     * @return void
+     */
+    public function setUseIncludePath($useIncludePath)
+    {
+        $this->useIncludePath = $useIncludePath;
+    }
+
+    /**
+     * Can be used to check if the autoloader uses the include path to check
+     * for classes.
+     *
+     * @return bool
+     */
+    public function getUseIncludePath()
+    {
+        return $this->useIncludePath;
+    }
+
+    /**
+     * Turns off searching the prefix and fallback directories for classes
+     * that have not been registered with the class map.
+     *
+     * @param bool $classMapAuthoritative
+     *
+     * @return void
+     */
+    public function setClassMapAuthoritative($classMapAuthoritative)
+    {
+        $this->classMapAuthoritative = $classMapAuthoritative;
+    }
+
+    /**
+     * Should class lookup fail if not found in the current class map?
+     *
+     * @return bool
+     */
+    public function isClassMapAuthoritative()
+    {
+        return $this->classMapAuthoritative;
+    }
+
+    /**
+     * APCu prefix to use to cache found/not-found classes, if the extension is enabled.
+     *
+     * @param string|null $apcuPrefix
+     *
+     * @return void
+     */
+    public function setApcuPrefix($apcuPrefix)
+    {
+        $this->apcuPrefix = function_exists('apcu_fetch') && filter_var(ini_get('apc.enabled'), FILTER_VALIDATE_BOOLEAN) ? $apcuPrefix : null;
+    }
+
+    /**
+     * The APCu prefix in use, or null if APCu caching is not enabled.
+     *
+     * @return string|null
+     */
+    public function getApcuPrefix()
+    {
+        return $this->apcuPrefix;
+    }
+
+    /**
+     * Registers this instance as an autoloader.
+     *
+     * @param bool $prepend Whether to prepend the autoloader or not
+     *
+     * @return void
+     */
+    public function register($prepend = false)
+    {
+        spl_autoload_register(array($this, 'loadClass'), true, $prepend);
+
+        if (null === $this->vendorDir) {
+            return;
+        }
+
+        if ($prepend) {
+            self::$registeredLoaders = array($this->vendorDir => $this) + self::$registeredLoaders;
+        } else {
+            unset(self::$registeredLoaders[$this->vendorDir]);
+            self::$registeredLoaders[$this->vendorDir] = $this;
+        }
+    }
+
+    /**
+     * Unregisters this instance as an autoloader.
+     *
+     * @return void
+     */
+    public function unregister()
+    {
+        spl_autoload_unregister(array($this, 'loadClass'));
+
+        if (null !== $this->vendorDir) {
+            unset(self::$registeredLoaders[$this->vendorDir]);
+        }
+    }
+
+    /**
+     * Loads the given class or interface.
+     *
+     * @param  string    $class The name of the class
+     * @return true|null True if loaded, null otherwise
+     */
+    public function loadClass($class)
+    {
+        if ($file = $this->findFile($class)) {
+            $includeFile = self::$includeFile;
+            $includeFile($file);
+
+            return true;
+        }
+
+        return null;
+    }
+
+    /**
+     * Finds the path to the file where the class is defined.
+     *
+     * @param string $class The name of the class
+     *
+     * @return string|false The path if found, false otherwise
+     */
+    public function findFile($class)
+    {
+        // class map lookup
+        if (isset($this->classMap[$class])) {
+            return $this->classMap[$class];
+        }
+        if ($this->classMapAuthoritative || isset($this->missingClasses[$class])) {
+            return false;
+        }
+        if (null !== $this->apcuPrefix) {
+            $file = apcu_fetch($this->apcuPrefix.$class, $hit);
+            if ($hit) {
+                return $file;
+            }
+        }
+
+        $file = $this->findFileWithExtension($class, '.php');
+
+        // Search for Hack files if we are running on HHVM
+        if (false === $file && defined('HHVM_VERSION')) {
+            $file = $this->findFileWithExtension($class, '.hh');
+        }
+
+        if (null !== $this->apcuPrefix) {
+            apcu_add($this->apcuPrefix.$class, $file);
+        }
+
+        if (false === $file) {
+            // Remember that this class does not exist.
+            $this->missingClasses[$class] = true;
+        }
+
+        return $file;
+    }
+
+    /**
+     * Returns the currently registered loaders keyed by their corresponding vendor directories.
+     *
+     * @return array<string, self>
+     */
+    public static function getRegisteredLoaders()
+    {
+        return self::$registeredLoaders;
+    }
+
+    /**
+     * @param  string       $class
+     * @param  string       $ext
+     * @return string|false
+     */
+    private function findFileWithExtension($class, $ext)
+    {
+        // PSR-4 lookup
+        $logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . $ext;
+
+        $first = $class[0];
+        if (isset($this->prefixLengthsPsr4[$first])) {
+            $subPath = $class;
+            while (false !== $lastPos = strrpos($subPath, '\\')) {
+                $subPath = substr($subPath, 0, $lastPos);
+                $search = $subPath . '\\';
+                if (isset($this->prefixDirsPsr4[$search])) {
+                    $pathEnd = DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $lastPos + 1);
+                    foreach ($this->prefixDirsPsr4[$search] as $dir) {
+                        if (file_exists($file = $dir . $pathEnd)) {
+                            return $file;
+                        }
+                    }
+                }
+            }
+        }
+
+        // PSR-4 fallback dirs
+        foreach ($this->fallbackDirsPsr4 as $dir) {
+            if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr4)) {
+                return $file;
+            }
+        }
+
+        // PSR-0 lookup
+        if (false !== $pos = strrpos($class, '\\')) {
+            // namespaced class name
+            $logicalPathPsr0 = substr($logicalPathPsr4, 0, $pos + 1)
+                . strtr(substr($logicalPathPsr4, $pos + 1), '_', DIRECTORY_SEPARATOR);
+        } else {
+            // PEAR-like class name
+            $logicalPathPsr0 = strtr($class, '_', DIRECTORY_SEPARATOR) . $ext;
+        }
+
+        if (isset($this->prefixesPsr0[$first])) {
+            foreach ($this->prefixesPsr0[$first] as $prefix => $dirs) {
+                if (0 === strpos($class, $prefix)) {
+                    foreach ($dirs as $dir) {
+                        if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
+                            return $file;
+                        }
+                    }
+                }
+            }
+        }
+
+        // PSR-0 fallback dirs
+        foreach ($this->fallbackDirsPsr0 as $dir) {
+            if (file_exists($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
+                return $file;
+            }
+        }
+
+        // PSR-0 include paths.
+        if ($this->useIncludePath && $file = stream_resolve_include_path($logicalPathPsr0)) {
+            return $file;
+        }
+
+        return false;
+    }
+
+    /**
+     * @return void
+     */
+    private static function initializeIncludeClosure()
+    {
+        if (self::$includeFile !== null) {
+            return;
+        }
+
+        /**
+         * Scope isolated include.
+         *
+         * Prevents access to $this/self from included files.
+         *
+         * @param  string $file
+         * @return void
+         */
+        self::$includeFile = \Closure::bind(static function($file) {
+            include $file;
+        }, null, null);
+    }
+}
diff --git a/vendor/composer/LICENSE b/vendor/composer/LICENSE
new file mode 100644
index 000000000..f27399a04
--- /dev/null
+++ b/vendor/composer/LICENSE
@@ -0,0 +1,21 @@
+
+Copyright (c) Nils Adermann, Jordi Boggiano
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
diff --git a/vendor/composer/autoload_classmap.php b/vendor/composer/autoload_classmap.php
new file mode 100644
index 000000000..0fb0a2c19
--- /dev/null
+++ b/vendor/composer/autoload_classmap.php
@@ -0,0 +1,10 @@
+<?php
+
+// autoload_classmap.php @generated by Composer
+
+$vendorDir = dirname(__DIR__);
+$baseDir = dirname($vendorDir);
+
+return array(
+    'Composer\\InstalledVersions' => $vendorDir . '/composer/InstalledVersions.php',
+);
diff --git a/vendor/composer/autoload_namespaces.php b/vendor/composer/autoload_namespaces.php
new file mode 100644
index 000000000..15a2ff3ad
--- /dev/null
+++ b/vendor/composer/autoload_namespaces.php
@@ -0,0 +1,9 @@
+<?php
+
+// autoload_namespaces.php @generated by Composer
+
+$vendorDir = dirname(__DIR__);
+$baseDir = dirname($vendorDir);
+
+return array(
+);
diff --git a/vendor/composer/autoload_psr4.php b/vendor/composer/autoload_psr4.php
new file mode 100644
index 000000000..bc1378b56
--- /dev/null
+++ b/vendor/composer/autoload_psr4.php
@@ -0,0 +1,10 @@
+<?php
+
+// autoload_psr4.php @generated by Composer
+
+$vendorDir = dirname(__DIR__);
+$baseDir = dirname($vendorDir);
+
+return array(
+    'exface\\Core\\' => array($baseDir . '/'),
+);
diff --git a/vendor/composer/autoload_real.php b/vendor/composer/autoload_real.php
new file mode 100644
index 000000000..cd828ab57
--- /dev/null
+++ b/vendor/composer/autoload_real.php
@@ -0,0 +1,38 @@
+<?php
+
+// autoload_real.php @generated by Composer
+
+class ComposerAutoloaderInite583d99b03ad449d5bb77b52da0c75ea
+{
+    private static $loader;
+
+    public static function loadClassLoader($class)
+    {
+        if ('Composer\Autoload\ClassLoader' === $class) {
+            require __DIR__ . '/ClassLoader.php';
+        }
+    }
+
+    /**
+     * @return \Composer\Autoload\ClassLoader
+     */
+    public static function getLoader()
+    {
+        if (null !== self::$loader) {
+            return self::$loader;
+        }
+
+        require __DIR__ . '/platform_check.php';
+
+        spl_autoload_register(array('ComposerAutoloaderInite583d99b03ad449d5bb77b52da0c75ea', 'loadClassLoader'), true, true);
+        self::$loader = $loader = new \Composer\Autoload\ClassLoader(\dirname(__DIR__));
+        spl_autoload_unregister(array('ComposerAutoloaderInite583d99b03ad449d5bb77b52da0c75ea', 'loadClassLoader'));
+
+        require __DIR__ . '/autoload_static.php';
+        call_user_func(\Composer\Autoload\ComposerStaticInite583d99b03ad449d5bb77b52da0c75ea::getInitializer($loader));
+
+        $loader->register(true);
+
+        return $loader;
+    }
+}
diff --git a/vendor/composer/autoload_static.php b/vendor/composer/autoload_static.php
new file mode 100644
index 000000000..27210e700
--- /dev/null
+++ b/vendor/composer/autoload_static.php
@@ -0,0 +1,36 @@
+<?php
+
+// autoload_static.php @generated by Composer
+
+namespace Composer\Autoload;
+
+class ComposerStaticInite583d99b03ad449d5bb77b52da0c75ea
+{
+    public static $prefixLengthsPsr4 = array (
+        'e' => 
+        array (
+            'exface\\Core\\' => 12,
+        ),
+    );
+
+    public static $prefixDirsPsr4 = array (
+        'exface\\Core\\' => 
+        array (
+            0 => __DIR__ . '/../..' . '/',
+        ),
+    );
+
+    public static $classMap = array (
+        'Composer\\InstalledVersions' => __DIR__ . '/..' . '/composer/InstalledVersions.php',
+    );
+
+    public static function getInitializer(ClassLoader $loader)
+    {
+        return \Closure::bind(function () use ($loader) {
+            $loader->prefixLengthsPsr4 = ComposerStaticInite583d99b03ad449d5bb77b52da0c75ea::$prefixLengthsPsr4;
+            $loader->prefixDirsPsr4 = ComposerStaticInite583d99b03ad449d5bb77b52da0c75ea::$prefixDirsPsr4;
+            $loader->classMap = ComposerStaticInite583d99b03ad449d5bb77b52da0c75ea::$classMap;
+
+        }, null, ClassLoader::class);
+    }
+}
diff --git a/vendor/composer/platform_check.php b/vendor/composer/platform_check.php
new file mode 100644
index 000000000..589e9e770
--- /dev/null
+++ b/vendor/composer/platform_check.php
@@ -0,0 +1,26 @@
+<?php
+
+// platform_check.php @generated by Composer
+
+$issues = array();
+
+if (!(PHP_VERSION_ID >= 70200)) {
+    $issues[] = 'Your Composer dependencies require a PHP version ">= 7.2.0". You are running ' . PHP_VERSION . '.';
+}
+
+if ($issues) {
+    if (!headers_sent()) {
+        header('HTTP/1.1 500 Internal Server Error');
+    }
+    if (!ini_get('display_errors')) {
+        if (PHP_SAPI === 'cli' || PHP_SAPI === 'phpdbg') {
+            fwrite(STDERR, 'Composer detected issues in your platform:' . PHP_EOL.PHP_EOL . implode(PHP_EOL, $issues) . PHP_EOL.PHP_EOL);
+        } elseif (!headers_sent()) {
+            echo 'Composer detected issues in your platform:' . PHP_EOL.PHP_EOL . str_replace('You are running '.PHP_VERSION.'.', '', implode(PHP_EOL, $issues)) . PHP_EOL.PHP_EOL;
+        }
+    }
+    trigger_error(
+        'Composer detected issues in your platform: ' . implode(' ', $issues),
+        E_USER_ERROR
+    );
+}