title: Selection contains unresolved reference
body: <p>I got a class that extends from TextField. I inserted the control manually into the fxml file and included an import statement. Now I can't see the controls in the Scene Builder version 2.0. Instead I get a message stating: "Selection contains unresolved reference". How would I go about and resolve them?</p>
  
  <p><strong>Edit:</strong></p>
  
  <p>I think I was not clear in stating where my problem lies. It seems to me that I should be able to set the classpath that points to the class of my custom control. Some websites like <a href="https://docs.oracle.com/javafx/scenebuilder/1/user_guide/library-panel.htm" rel="nofollow">this</a> one tell me to choose a menu entry called <em>Resolve Unknown Types</em>. Since this menu entry <strong>does not exist</strong> in my version of Scene Builder I thought that there must exist some new mechanism which resolves these kind of issues. That's the reason why I was so vague in my question. In hindsight that might have not been a good idea.</p>
  
  <p><strong>FocusedTextField.java:</strong></p>
  
  <pre><code>package de.foo.bar.gui;
  
  import javafx.beans.property.StringProperty;
  import javafx.scene.control.TextField;
  
  public class FocusedTextField extends TextField{
  
      public void setStringProperty(StringProperty stringProperty){
          focusedProperty().addListener((observable, oldValue, newValue) -&gt; 
                                         stringProperty.setValue(getText()));
      }
  }
  </code></pre>
  
  <p>Excerpt from <strong>FooDialog.fxml</strong>:</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  
  &lt;?import de.foo.bar.gui.*?&gt;    
  &lt;?import javafx.scene.control.*?&gt;
  &lt;?import javafx.scene.layout.*?&gt;
  
  &lt;AnchorPane&gt;
      &lt;children&gt;                        
          &lt;FocusedTextField fx:id="fooField" /&gt;
          &lt;FocusedTextField fx:id="barField" /&gt;
      &lt;/children&gt;
  &lt;/AnchorPane&gt;
  </code></pre>