To better emphasize the fact that all returned properties require an instance
of the class they are declared in. Another issue was that
'Some::class.extensionProperties' was sometimes incorrectly perceived as
"get all extension properties available on the class Some"
Each property reference obtained by the '::' operator now causes back-end to
generate an anonymous subclass of the corresponding KProperty class, with the
customized behavior. This fixes a number of issues:
- get/set/name of property references now works without kotlin-reflect.jar in
the classpath
- get/set/name methods are now overridden with statically-generated property
access instead of the default KPropertyImpl's behavior of using Java
reflection, which should be a lot faster
- references to private/protected properties now work without the need to set
'accessible' flag, because corresponding synthetic accessors are generated at
compile-time near the target property
#KT-6870 Fixed
#KT-6873 Fixed
#KT-7033 Fixed
