The fully-qualified name for this Dart language entity.
This name is qualified by the name of the owner. For instance, the qualified name of a method 'method' in class 'Class' in library 'library' is 'library.Class.method'.
Returns a Symbol constructed from a string representing the fully qualified name of the reflectee. Let o be the owner of this mirror, let r be the reflectee of this mirror, let p be the fully qualified name of the reflectee of o, and let s be the simple name of r computed by simpleName. The fully qualified name of r is the concatenation of p, '.', and s.
Because an isolate can contain more than one library with the same name (at different URIs), a fully-qualified name does not uniquely identify any language entity.
Source
Symbol get qualifiedName;