an> <span class="parameter" id="RunUnaryHandler-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> <span class="parameter" id="RunUnaryHandler-param-arg"><span class="type-annotation">T</span> <span class="parameter-name">arg</span></span>)
    </section>

        <section class="summary source-code" id="source">
      <h2><span>Implement