NSNumber' is not convertible to 'CLLocationDistance'

[mueslifante]

Hello, i have an issue after install:
in this function,

open func format(_ number: NSNumber, formatter: NumberFormatterCustomLocaleAvailable, locale: Locale) -> String

let distance = number as CLLocationDistance

NSNumber' is not convertible to 'CLLocationDistance' (aka 'Double'); did you mean to use 'as!' to force downcast?

xCode Version 9.3.1 (9E501)
platform :ios, '10.0'
swift_version = "4.0"

[laszlotuss]

Force downcast is a bad practice, should prefer if let instead ...

[mengxinyizhui]

Force downcast is a bad practice, should prefer if let instead ...

so??