dart-async/Zone-class.html">Zone</a></span> <span class="parameter-name">zone</span>, </span> <span class="parameter" id="registerUnaryCallback-param-f"><span class="type-annotation">R</span> <span class="parameter-name">f</span>(<span class="parameter" id="f-param-arg"><span class="type-annotation">T</span> <span class="parameter-name">arg</span></span>)</span>)
      
    </section>
    
    <section class="summary source-code" id="source">
      <h2><span>Implementation</span></h2>
      <pre class="lang