ameter">T</span>&gt;</span></span>
            <span class="name ">registerUnaryCallback</span>
&lt;<wbr><span class="type-parameter">R</span>, <span class="type-parameter">T</span>&gt;(<wbr><ol class="parameter-list"><li><span class="parameter" id="registerUnaryCallback-param-zone"><span class="type-annotation"><a href="../../dart-async/Zone-class.html">Zone</a></span> <span class="parameter-name">zone</span>, </span></li>
<li><span class="parameter" id="registerUnaryCallback-param-f"><span class="type-ann