Bug 186947 Make dataSetEditor more compatible to oda
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/data/ui/property/PropertyNode.java
*/
	public final PropertyNode getSubNode( String id )
	{
		assert ( id != null ) : "Null id passed"; 
		if ( subNodes == null )
		{
			return null;
		}
		Iterator iter = subNodes.iterator( );
		while ( iter.hasNext( ) )
		{
			PropertyNode subNode = (PropertyNode) iter.next( );
			if ( subNode.getId( ).equals( id ) )
			{
				return subNode;
			}
		}
		return null;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.designer.ui.PropertyNode#getSubNodes()
	 */
	public final PropertyNode[] getSubNodes( )
	{
		if ( subNodes == null )
		{
			return null;
		}