Class APIs from java point of view stays the same so we can avoid generating those methods
Otherwise we have to calculate all supertypes when getMethods() is called,
which imposes severe performance penalties
We have to pretend these methods are not 'abstract' (also we consider them 'default' for safety)
so java highlighting does not report "class should be abstract" for all inheritors
We have to manually report "class should be abstract" on some of the java inheritors,
specifically those that are implementing interfaces directly
as opposed to extending kotlin classes implementing those interfaces
This is not accurate, there are some cases when we will generate DefaultImpls class that are not covered:
- Inherited default implementations
- Annotated members
In these cases IDE will report an error when in fact code compiles
What is critical though is to be able to decide whether to build DefaultImpls light classes solely based on psi without triggering stubs calculation
Pavel V. Talanov