isTopLevel property
bool isTopLevelWhether this declaration is top-level.
A declaration is considered top-level if its owner is a LibraryMirror.
Source
bool get isTopLevel;
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-mirrors/DeclarationMirror/isTopLevel.html