#327 Move MethodRetrievalProcessor#allEnclosingElementsIncludeSuper to Executables#getAllEnclosingExecutableElements and replace any Elements#getAllMembers calls with it (to create a fixed order of property mappings)
#327 Improving method name; Formatting
#343 wrongly placed candidates.clear() causes too many error messages
#339 error message clarification: ambiguous mapping method
#339 error message clarification: #321, adding coding hint to 'can't map property'
#341 method annotated with qualifier should not qualify for mappings without qualifiedBy