code: private Text createConfLabelText(ModifyListener listener,
        Composite parent, ConfProp prop, String labelText) {
  
      Label label = new Label(parent, SWT.NONE);
      if (labelText == null)
        labelText = prop.name;
      label.setText(labelText);
  
      return createConfText(listener, parent, prop);
    }
docs: Create editor entry for the given configuration property. The editor is
  a couple (Label, Text).
  
  @param listener the listener to trigger on property change
  @param parent the SWT parent container
  @param prop the property to create an editor for
  @param labelText a label (null will defaults to the property name)
  
  @return a SWT Text field