Java interop issues

Call of Java mutator method on immutable Kotlin collection  

Reports Java mutator methods calls (like fill, reverse, shuffle, sort) on an immutable Kotlin collection.

Java default methods are not overridden by delegation  

Reports delegation when the delegate object is an instance of a class that overrides (in the case of final and sealed classes) or may override (in the case of open and abstract classes) Java default methods.

Nullable type argument in Java collection that doesn't support nulls  

Reports providing nullable type arguments to Java collections that don't accept nulls.