see page http://ipg-jets.us.oracle.com/JavaFX/id_common-files/id_common-outgoing/doctest/E17411_01/javafx/2.0/api/javafx/fxml/doc-files/introduction_to_fxml.html

1.
sample in "Static Properties" paragraph, after "The following FXML invokes the static setter for GridPane's "rowIndex" and "columnIndex" properties:"

<GridPane>
...
</TabPane>

2.
sample in another "Static Properties" paragraph, after "to demonstrate static property elements could be rewritten as follows:"

<GridPane>
...
</TabPane>