return only extensions (functions) when we expecting extensions (not all functions);
for properties it's not that easy: they may have extension function types, and we want to avoid early computing of deferred types
rename: getNonMembersByName -> getExtensionsByName
Report NO_RECEIVER_ALLOWED for '42.(f)()' where f: () -> Unit in TracingStrategyForInvoke
(we don't store candidates for such 'invoke' functions any more)
Svetlana Isakova
29fa87ee7c