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kotlinlang

I’m not familiar with the binding adapter, but if it doesn’t support kotlin directly, consider just making a global function and annotate it with `@JvmStatic`.

See
<https://stackoverflow.com/questions/37075871/can-i-bind-an-error-message-to-a-textinputlayout>

<@U68EH8Q79> This is not required for bindings and defining binding adapter as extension function for view is just fine, it's quite idiomatic Imo and works with bindings