                    <p>The core reactor, or event loop.</p>

                           </td>
                       </tr>
                       <tr class=' module-item'>
                           <td><a class="struct" href="struct.Registration.html"
                                  title='struct tokio::reactor::Registration'>Registration</a></td>
                           <td class='docblock-short'>
                                <p>Associates an I/O resource with the reactor instance that drives it.<