How I arrange items in class

dart name spacing

  PointerAgent.internal(): super.internal() {
    _startPoint =     new Point(0, 0);
    _currentPoint =   new Point(0, 0);
    _lastPoint =      new Point(0, 0);
    _longPressDelay = new Delay(1500, _fireLongPress);
    _raf = new AnimationFrame(mutate: (_) {_handleAnimationFrame(_);});
    _initEventListeners();
  }

  AnimationFrame                              _raf;
  Set<html.Element>                           _elements = new Set();
  Map<html.Element, Component>                _elementToComponentMap = new Map();
  Map<html.Element, List<StreamSubscription>> _elementToSubscriptionsMap = new Map();
  Delay                                       _longPressDelay;

  bool                                        _cancelMoveEvent = false;
  List<StreamSubscription>                    _mouseMoveSubscriptionOnDocument;
  html.Element                                _currentElement;
  T                                           _currentComponent;
  SourceType                                  _originalEventType = SourceType.UNKNOWN;
  html.Element                                _sourceElement;

  Point                                       _startPoint;
  Point                                       _currentPoint;
  Point                                       _lastPoint;