code: protected BufferedImage createChartImage(JFreeChart chart)
  	{
  		return chart.createBufferedImage(settings.getWidth(), settings.getHeight(), chartRenderingInfo);
  	}
docs: <p>createChartImage.</p>
  
  @param chart a {@link org.jfree.chart.JFreeChart} object.
  @return a {@link java.awt.image.BufferedImage} object.