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 void clearLocalProperties( ) throws SemanticException
	{
		ActivityStack stack = module.getActivityStack( );
		stack.startTrans( );
		try
		{
			Iterator iter = propertyIterator( );
			while ( iter.hasNext( ) )
			{
				GroupPropertyHandle propHandle = (GroupPropertyHandle) iter
						.next( );
				String propName = propHandle.getPropertyDefn( ).getName( );
				if ( IDesignElementModel.EXTENDS_PROP.equals( propName )
						|| IDesignElementModel.NAME_PROP.equals( propName )
						|| IExtendedItemModel.EXTENSION_NAME_PROP
								.equals( propName )
						|| propHandle.isExtensionXMLProperty( ) )
				{
					
					continue;
				}
				Object localValue = propHandle.getLocalValue( );
				if ( localValue != null )
				{
					propHandle.clearValue( );
				}
			}
		}
		catch ( SemanticException e )
		{