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/GroupPropertyHandle.java
*/
	public final boolean shareSameValue( )
	{
		Iterator iter = handle.getElements( ).iterator( );
		
		if ( !iter.hasNext( ) )
			return false;
		DesignElementHandle elemHandle = (DesignElementHandle) iter.next( );
		
		Object baseValue = null;
		if ( propDefn.getTypeCode( ) == IPropertyType.STRUCT_TYPE )
			baseValue = elemHandle.getProperty( propDefn.getName( ) );
		else
			baseValue = elemHandle.getStringProperty( propDefn.getName( ) );
		while ( iter.hasNext( ) )
		{
			elemHandle = (DesignElementHandle) iter.next( );
			Object value = null;
			if ( propDefn.getTypeCode( ) == IPropertyType.STRUCT_TYPE )
				value = elemHandle.getProperty( propDefn.getName( ) );
			else
				value = elemHandle.getStringProperty( propDefn.getName( ) );
			if ( baseValue == null )
			{
				if ( value != null )
					return false;
			}
			else
			{
				if ( !baseValue.equals( value ) )