[CSL] Unused tooltip is not shown

[junichi11]

Apache NetBeans version

Apache NetBeans latest daily build

What happened

Unused tooltip is not shown.
Probably, after this change: #8028

NetBeans 24:

master branch:

Language / Project Type / NetBeans Component

CSL

How to reproduce

1. Create a PHP project
2. Create a new PHP file
3. Write the following code

<?php
class Test {
    private int $privateField = 1;
}

Did this work correctly in an earlier version?

Apache NetBeans 24

Operating System

Ubuntu 22.04

JDK

OpenJDK 19

Apache NetBeans packaging

Apache NetBeans provided installer

Anything else

No response

Are you willing to submit a pull request?

No

[matthiasblaesing]

Verified:

• Problem can be observed in 0ba2e7a
• Problem is not present in 1261641

[lkishalmi]

Could be something with the weak references. some of the unused tooltips are actually displayed, usually just once, then they are gone.

[matthiasblaesing]

Please have a look at #8103. I fixed firstSequenceElement and added a unittest to verify the behavior.