[VoidWhisperer]

Off-topic slightly: does anything similar to what they are doing with that require extension method exist in Kotlin?

[oaiey]

The expression part or the extension method part? (Obviously: No clue about Kotlin, just interested)

[VoidWhisperer]

The extension part mainly, like the ability to add an extension method that can apply to 'everything' to an extent like the Require() here does