int.summary}}</a></li>
          {% endif %}
          {% endfor %}
        </ul>
      </div>
      <div class="col-md-6">
        <p>
This section contains APIs related to cart items.
        </p>
        <p>
In order to pay for a subscription, a billing profile will add plans to a cart,
then checkout that cart, entering a payment method in the process.
        </p>
      </div>
    </div>
    <a name="chargemodel"></a>
    <h3>Charges <a href="#chargemodel" class="header-anchor"><i class="fa fa-link"></i