plugins/javaFX/testData/completion/referencedAttributes.fxml

<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.control.Label?>
<GridPane xmlns:fx="http://javafx.com/fxml">
  <fx:define>
    <Label fx:id="lab" text="MyText" GridPane.rowIndex="1"/>
  </fx:define>
  <fx:reference source="lab" <caret>/>
</GridPane>