/a></code></dt><dd><p>Add the arguments needed to attach the facebook-clang-plugins plugin. Must be called on normalized commands.</p></dd></dl><dl><dt class="spec value" id="val-prepend_arg"><a href="#val-prepend_arg" class="anchor"></a><code><span class="keyword">val</span> prepend_arg : string <span>&#45;&gt;</span> <a href="index.html#type-t">t</a> <span>&#45;&gt;</span> <a href="index.html#type-t">t</a></code></dt><dt class="spec value" id="val-append_args"><a href="#val-append_args" class="anchor"></a