title: JavaFX8 : BooleanBinding disabledProperty for content of textproperty not working
body: <p>Im trying to create a boolean binding for the disabled property of a node.
  Node should be enabled if a textProperty value does end with a defined string:</p>
  
  <pre><code>myheckbox.disabledProperty().bind(Bindings.createBooleanBinding(()
                  -&gt; myLabel.getText().endsWith(".txt"), myLabel.textProperty()));
  </code></pre>
  
  <p>This does not compile due to:
  The method bind(BooleanBinding) is undefined for the type ReadOnlyBooleanProperty</p>
  
  <p>How can i bind this? The checkbox is disabled initially and should be enabled if the label contains a filename ending with ".txt"</p>