@Override public Object clone() throws CloneNotSupportedException {
  XYSeries clone=(XYSeries)super.clone();
  clone.data=(List)ObjectUtilities.deepClone(this.data);
  return clone;
}

@ Override public Object clone ( ) throws CloneNotSupportedException { XYSeries clone = ( XYSeries ) super . clone ( ) ; clone . data = ( List ) ObjectUtilities . deepClone ( this . data ) ; return clone ; }
returns a clone of the series .
