     removeFromSuperview()
   }
   
+  override func keyDown(theEvent: NSEvent) {
+    sprint("key down")
+  }
   
   // MARK: - Mouse events
   

    textField.editable = true
    textField.hidden = false
  }

  func disableTextField() {
    sprint("disable text field")
    textField.editable = false

    Swift.print("ConceptView [\(concept.identifier)]: \(message)")
  }
  
}