A mirror on the owner of this Dart language entity.
The owner is the declaration immediately surrounding the reflectee:
- For a library, the owner is 
null. - 
For a class declaration, typedef or top level function or variable, the owner is the enclosing library.
 - For a mixin application 
S with M, the owner is the owner ofM. - For a constructor, the owner is the immediately enclosing class.
 - 
For a method, instance variable or a static variable, the owner is the immediately enclosing class, unless the class is a mixin application
S with M, in which case the owner isM. Note thatMmay be an invocation of a generic. - 
For a parameter, local variable or local function the owner is the immediately enclosing function.