method notifyPropertyChange

dynamic notifyPropertyChange(Symbol field, Object oldValue, Object newValue)

Notify that the field name of this object has been changed.

The oldValue and newValue are also recorded. If the two values are equal, no change will be recorded.

For convenience this returns newValue. This makes it easy to use in a setter:

var _myField;
@reflectable get myField => _myField;
@reflectable set myField(value) {
  _myField = notifyPropertyChange(#myField, _myField, value);
}

Source

notifyPropertyChange(Symbol field, Object oldValue, Object newValue)
    => notifyPropertyChangeHelper(this, field, oldValue, newValue);