public void setRunningTime(double runningTime) {
   this.timestampRuler.setMaxUnit(runningTime);
   this.runningTime = runningTime;
   getRowHeader().revalidate();
   usedHeapRenderer.invalidate();
   chart.revalidate();
 }
 @Override
 public void setShowUsedMemoryLine(boolean showUsedMemoryLine) {
   usedHeapRenderer.setVisible(showUsedMemoryLine);
 }
 @Override
 public boolean isShowUsedMemoryLine() {
   return usedHeapRenderer.isVisible();
 }