collapse method

void collapse()

Implementation

void collapse() {
  if (_state.phase != OverlayPhase.fullscreen &&
      _state.phase != OverlayPhase.expanding) {
    return;
  }
  _state = _state.copyWith(phase: OverlayPhase.collapsing);
  notifyListeners();
  _expandController.reverse(from: _expandController.value);
}