Bug 155943 "Restore Properties" is always enabled for extended chart
Steps to reproduce: 1.New a report, includes a library, extends lib.chart 2.Choose the chart Expected result: "Restore Properties" is disabled untill set/change any local properties for the chart Actual result: "Restore Properties" is always enabled
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/GroupElementHandle.java
*/
		Iterator propIterator;
		/**
		 * Constructs the group property iterator with the common property list.
		 * 
		 * @param list
		 */
		GroupPropertyIterator( List list )
		{
			propIterator = list.iterator( );
		}
		public void remove( )
		{
			
		}
		public boolean hasNext( )
		{
			if ( propIterator == null )
				return false;
			return propIterator.hasNext( );
		}
		public Object next( )
		{
			if ( !propIterator.hasNext( ) )
				return null;
			return new GroupPropertyHandle( GroupElementHandle.this,
					(ElementPropertyDefn) propIterator.next( ) );
		}
	};
}