deactivate method

@override void deactivate()

The framework calls this method whenever it removes this StateX object from the tree.

Implementation

@override
void deactivate() {
  super.deactivate();

  // No need. States do this themselves
  // forEachState((state) {
  //   state.deactivate();
  // }, reversed: true, remove: this);

  // Return the original error handler
  FlutterError.onError = _currentErrorFunc;
}