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/elements/ExtendedItem.java
*/
	private PeerExtensibilityProvider provider = null;
	private ContentTree contentTree = null;
	/**
	 * Default constructor.
	 */
	public ExtendedItem( )
	{
	}
	/**
	 * Constructs the extended item with an optional name.
	 * 
	 * @param theName
	 *            optional item name
	 */
	public ExtendedItem( String theName )
	{
		super( theName );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.core.DesignElement#apply(org.eclipse.birt.report.model.elements.ElementVisitor)
	 */
	public void apply( ElementVisitor visitor )
	{
		visitor.visitExtendedItem( this );
	}
	/*
	 * (non-Javadoc)