.getPropertyHandle( Style.HIGHLIGHT_RULES_PROP );
.getPropertyHandle( IStyleModel.HIGHLIGHT_RULES_PROP );
	public void testSetOperator( ) throws SemanticException,			DesignFileException	{		openDesign( "HighlightRuleHandleText.xml" ); //$NON-NLS-1$		DataItemHandle dataHandle = (DataItemHandle) designHandle				.getElementByID( 4 );		PropertyHandle propHandle = dataHandle				.getPropertyHandle( Style.HIGHLIGHT_RULES_PROP );		Iterator propIterator = propHandle.iterator( );		HighlightRuleHandle handle = (HighlightRuleHandle) propIterator.next( );				handle.setOperator( DesignChoiceConstants.MAP_OPERATOR_BETWEEN );		assertEquals( "1" , handle.getValue1( ) );//$NON-NLS-1$		assertEquals( "3" , handle.getValue2( ) );//$NON-NLS-1$				handle.setOperator( DesignChoiceConstants.MAP_OPERATOR_EQ );		assertEquals( "1" , handle.getValue1( ) );//$NON-NLS-1$		assertNull( handle.getValue2( ) );		handle.setOperator( DesignChoiceConstants.MAP_OPERATOR_NULL );		assertNull( handle.getValue1( ) );		assertNull( handle.getValue2( ) );	}