ult">(defaults to: <tt>nil</tt>)</em>
      
      
        &mdash;
        <div class='inline'>
<p>Either the family that contains the requested component, or an instance implementing <code>model_name</code> from which the family name is auto-generated. Examples: <code>Users</code>, <code>&#39;Users&#39;</code>, <code>:users</code>, <code>User.first</code></p>
</div>
      
    </li>
  
    <li>
      
        <span class='name'>label_opts</span>
      
      
        <span class='type'>(<tt>Hash</tt>)</sp