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
* @throws SemanticException
	 *             if the target element type is not as same as this element
	 *             type, or property is not defined .
	 * @throws IllegalArgumentException
	 *             if the target element is not in the same report as this
	 *             element.
	 */
	public void copyPropertyTo( String propName,
			DesignElementHandle targetHandle ) throws SemanticException
	{
		assert ( targetHandle.getModule( ) == getModule( ) );
		if ( targetHandle.getModule( ) != getModule( ) )
			throw new IllegalArgumentException( "The target element should be in the same report !" ); 
		if ( targetHandle.getDefn( ) != getDefn( ) )
			throw new PropertyValueException( targetHandle.getDefn( ).getName( ),
					PropertyValueException.DESIGN_EXCEPTION_WRONG_ELEMENT_TYPE,
					IPropertyType.ELEMENT_REF_TYPE );
		PropertyDefn propDefn = (ElementPropertyDefn) getDefn( ).getProperty( propName );
		if ( propDefn == null )
			throw new PropertyNameException( getElement( ), propName );
		propDefn = (ElementPropertyDefn) targetHandle.getDefn( )
				.getProperty( propName );
		if ( propDefn == null )
			throw new PropertyNameException( targetHandle.getElement( ),
					propName );
		Object value = getElement( ).getLocalProperty( module,
				propDefn.getName( ) );
		if ( value == null )
		{
			targetHandle.setProperty( propName, null );