Bug 176436 Charts Imported from Libraries do not update when libraries change
During a live presentation of BIRT at EclipseCon, we came across a rather embarassing issue. When charts are included in a library, and imported into a report design from a library, any changes to the library instance of the chart do not reflect in the report itself.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/SimpleGroupElementHandle.java
*/
public class SimpleGroupElementHandle extends GroupElementHandle
{
	/**
	 * The module that provides overall information, especially the command
	 * stack.
	 */
	protected final Module module;
	/**
	 * List of handles to design elements.
	 */
	protected List elements = null;
	/**
	 * Constructs a handle to deal with a list of report elements. The contents
	 * of the given list should be design element handles.
	 * 
	 * @param moduleHandle
	 *            the handle of module
	 * @param elements
	 *            a list of handles of design elements. If a item is not
	 *            <code>DesignElementHandle</code>, it is ignored.
	 * @see DesignElementHandle
	 */
	public SimpleGroupElementHandle( ModuleHandle moduleHandle, List elements )
	{
		assert moduleHandle != null;
		module = moduleHandle.getModule( );
		assert elements != null;
		this.elements = elements;
	}