public void addFillOutsideLine(FillOutsideLine fill){
  mFillBelowLine.add(fill);
}

public void addFillOutsideLine ( FillOutsideLine fill ) { mFillBelowLine . add ( fill ) ; }
sets if the line chart should be filled outside its line . filling outside with filloutsideline . integral the line transforms a line chart into an area chart .
