a href="#val-merge_dispatchers" class="anchor"></a><code><span class="keyword">val</span> merge_dispatchers : <span><span>(<span class="type-var">'context</span>, <span class="type-var">'f</span>, <span class="type-var">'arg_payload</span>)</span> <a href="index.html#type-dispatcher">dispatcher</a></span> <span>&#45;&gt;</span> <span><span>(<span class="type-var">'context</span>, <span class="type-var">'f</span>, <span class="type-var">'arg_payload</span>)</span> <a href="index.html#type-dispatcher">dis