One of the problems is that type qualifier, even directly on returned type, doesn't always mean exactly the same thing as qualifier on provider function/property for @IntoSet and @IntoMap. Because of that I had to keep function/property qualifier separate from resulting qualifier in TypeKey, but merge them together with type qualifier for equals check.

I think if we stop considering val qwe: @Qualifier String and @get:Qualifier val qwe: String to be equal we could keep only member qualifier in TypeKey and handle all type qualifiers only in equals. That would make code much simpler.

@evant wdyt?