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
implements
			IExtendableElement,
			IExtendedItemModel,
			IContentHandler
{
	/**
	 * Extended item can support extension. It has a unique name to identify the
	 * extension. Using this name, BIRT can get the extension definition. The
	 * name is an internal name for an implementation of extension.
	 * <p>
	 * The name does not occur in a name space.
	 */
	protected String extensionName = null;
	/**
	 * The extensibility provider which provides the functionality of this
	 * extendable element.