A modern programming language that makes developers happier.

kotlinlang

ok, so I'm back at making mixins work; turns out JsName did not work for
```class MyMenu extends HandlebarsApplicationMixin(ApplicationV2)```
Got it: turns out it's <https://youtrack.jetbrains.com/issue/KT-56818/KJS-TypeError-Class-constructor-cannot-be-invoked-without-new-when-extending-external-class#focus=Comments-27-8432706.0-0|https://youtrack.jetbrains.com/issue/KT-56818/KJS-TypeError-Class-constructor-cannot-be-invoked-without-new-when-extending-external-class#foc[…].0-0>