ions/Signal/Observer.html">– Observer</a>
              </li>
              <li class="nav-group-task">
                <a href="../Extensions/SignalProducerProtocol.html">SignalProducerProtocol</a>
              </li>
              <li class="nav-group-task">
                <a href="../Extensions/SignalProtocol.html">SignalProtocol</a>
              </li>
              <li class="nav-group-task">
                <a href="../Extensions/SubjectType.html">SubjectType</a>
              </li>
              <