if it is unbound and the underlying type is reference type.
If the underlying type is primitive, it is boxed and unboxed
correctly, otherwise, it is simply casted and not unboxed.
Additionally, generate functions for inliner with inline classes
in signature, so unboxing works.
The unboxing is removed after inlining.
#KT-44722 Fixed
Ilmir Usmanov
741c1a864f