protected boolean startDrag(SVGPoint startPoint,Event evt){
  if (listener != null) {
    return listener.startDrag(startPoint,evt);
  }
  return true;
}

protected boolean startDrag ( SVGPoint startPoint , Event evt ) { if ( listener != null ) { return listener . startDrag ( startPoint , evt ) ; } return true ; }
action to do on drag start .
