#KT-14246 In Progress

Don't report error for properties and functions without body that either `external` by themselves or are members of `external` classes

 #KT-12176 In Progress

 #KT-5897 Fixed

Fix typos, formatting, diagnostic message

 #KT-12250 Fixed

Rename to avoid confusion with the recently added kotlin.KotlinVersion

Not all synthetic scope's descriptors are extensions (SAM adapters are not)

 #KT-11128 Fixed

After this change SAM adapters are being resolved in the same group
as members, thus their overload resolution happens simultaneously.

But in the case of overload resolution ambiguity try to filter out all
synthetic members and run the process again.

See the issue and new test for clarification

 #KT-11128 In Progress

Introduce CompositionTypeSubstitution instead of manual composition of
two substitutions.

This change is necessary for the later changes where original substitution
will be able to contain outer type parameters

 #KT-11128 In Progress

Obviously 'overridableGroup' cannot be both empty and having the single element.
'conflictedHandles' that is what meant to be empty instead

 #KT-15030 Fixed

"Change return type for enclosing fix" now handles TYPE_INFERENCE_EXPECTED_TYPE_MISMATCH correctly #KT-14063 Fixed