Bug 207036 [Regression] The chart in an old report design can not be rendered [13]
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/DeferredCacheManager.java
{
	
	private final IDeviceRenderer fDeviceRenderer;
	
	private final Chart fChart;
		
	private DeferredCache fFirstDC;
	
	private DeferredCache fLastDC;
	
	/**
	 * The single deferred cache object for some chart whose element must be put
	 * into a signle <code>DeferredCache</code> object.
	 * <p>
	 * Currently the stacked bar series, bubble seires and area series must be
	 * put into single cache.
	 */
	private DeferredCache fSingleDC;
	
	private final List fDeferredCacheList = new ArrayList( );
	/**
	 * Constructor of the class.
	 * 
	 * @param idr
	 *            specified device renderer.
	 * @param chart
	 *            specified chart instance.
	 */
	public DeferredCacheManager( IDeviceRenderer idr, Chart chart )
	{