title: How to use RadioGroupFieldEditor to manage its child components
body: <p>I did it to create simple radio buttons:</p>
  
  <pre><code>RadioGroupFieldEditor settingsSourceEditor =
      new RadioGroupFieldEditor("abc", "", 1, new String[][] {
                                                  { "Read settings from BIS-Installation directory", "1"" },
                                                  { "Manually specify settings", "'" } },
                                container);
  </code></pre>
  
  <p>But i want to extend it to be able to enable or disable the corresponding group of elements. The example of how it should look down below (except that both of radio buttons should have child elements):</p>
  
  <p><img src="https://i.stack.imgur.com/A365X.png" alt="example"></p>
  
  <p>Is there any functionality to add child elements like that or do I have to write my own sub-class to have it work like I want?</p>