UnexpectedFunctionBehaviour

@RequiresOptIn(message = "Calling or overriding this function may result in unexpected behaviour. Please ensure you read its documentation comment before continuing.", level = RequiresOptIn.Level.WARNING)
@Target(allowedTargets = [AnnotationTarget.FUNCTION])
annotation class UnexpectedFunctionBehaviour

Marks a function that may result in unexpected behaviour, and ask the developer to check the docs.