/**
  * Removes a {@link RadarChartLine} of the {@link RadarChartLineAppender} of this charts'
  * instance.
  *
  * @param index index to remove
  * @see RadarChartLineAppender#remove(int)
  */
 public RadarChartLine removeRadarChartLine(int index) {
   return radarChartLineAppender.remove(index);
 }
 /**
  * Removes a {@link RadarChartLine} of the {@link RadarChartLineAppender} of this charts'
  * instance.
  *
  * @param line line to remove
  * @see RadarChartLineAppender#remove(RadarChartLine)
  */
 public boolean removeRadarChartLine(RadarChartLine line) {
   return radarChartLineAppender.remove(line);
 }