#45;&gt;</span> <span>(<span><span>(<span class="type-var">'output</span>, <span class="type-var">'error</span>)</span> Stdlib.result</span> <span>&#45;&gt;</span> unit)</span> <span>&#45;&gt;</span> unit</code></dt><dt class="spec value" id="val-post0"><a href="#val-post0" class="anchor"></a><code><span class="keyword">val</span> post0 : <span>?&#8288;headers:<span><span>(string * string)</span> list</span></span> <span>&#45;&gt;</span> <span>?&#8288;params:<span><span>(<a href="../EzAPI/Param/index.html#