isSetter property
bool isSetterWhether the invocation was a setter call.
If so, positionalArguments has exactly one positional argument, and namedArguments is empty.
Source
bool get isSetter;
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-core/Invocation/isSetter.html