pan class='signature'>
      <a href='#list-dynamic'>
        #
(void)
<b>list</b><span>(p, cb)</span>
      </a>
    </span>
    <span class='desc'>
      List all value by a path 
    </span>
  </li>
  <li>
    <span class='signature'>
      <a href='#register-dynamic'>
        #
(void)
<b>register</b><span>(role, cb)</span>
      </a>
    </span>
    <span class='desc'>
      Register a service 
    </span>
  </li>
  <li>
    <span class='signature'>
      <a href='#query-dynamic'>
        #
(void)
<b>qu