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/DesignElementHandle.java
* Sets this element to extend the given element.
	 * 
	 * @param parent
	 *            the element that this element is to extend
	 * @throws ExtendsException
	 *             If the parent element is of the wrong type as this element.
	 * 
	 * @deprecated by {@link #setExtends(DesignElementHandle)}
	 */
	public void setExtendsElement( DesignElement parent )
			throws ExtendsException
	{
		ExtendsCommand cmd = new ExtendsCommand( module, getElement( ) );
		cmd.setExtendsElement( parent );
	}
	/**
	 * Returns the shared style, if any, as a style handle. A shared style is a
	 * style that defines in the "styles" slot of the report design.
	 * 
	 * @return a handle to the shared style used by this element. Returns null
	 *         if the style is not set, or if the element does not support a
	 *         style.
	 * 
	 * @see #setStyle(SharedStyleHandle)
	 * @see #setStyleElement(StyleElement)
	 * @see #setStyleName(String)
	 */
	public SharedStyleHandle getStyle( )
	{
		DesignElement style = getElement( ).getStyle( module );