A mirror on the owner of this Dart language entity.
The owner is the declaration immediately surrounding the reflectee:
null.S with M, the owner is the owner of M.S with M, in which case the owner is M. Note that M may be an invocation of a generic.DeclarationMirror get owner;
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dart.dev/stable/2.5.0/dart-mirrors/DeclarationMirror/owner.html