n this case, a
            <code>&lt;cc:actionSource&gt;</code> element is
            included in the usage contract that refers to the inner
            button in the <code>&lt;cc:implementation&gt;</code>
            section.</p>

          </li>

	  <li><p>Provide an "action" to invoke when the button is pressed.
	  </p>

           <p>In this case, a
            <code>&lt;cc:attribute&gt;</code> element is included
            in the usage contract that refers to the inner button in the
            <co