docs: public String getChartMap(String chartMapId)
  			throws IOException
  	{
  		StringWriter writer = new StringWriter();
  		PrintWriter pw = new PrintWriter(writer);
  
  		try
  		{
  			ChartUtilities.writeImageMap(pw, chartMapId, chartRenderingInfo,
  										 new StandardToolTipTagFragmentGenerator(),
  										 new StandardURLTagFragmentGenerator());
  		}
  		finally
  		{
  			IOUtil.closeQuietly(pw);
  		}
  
  		return writer.toString();
  	}