code class="type">'a <a href="Js_dict.html#TYPEt">t</a> -> <a href="Js_dict.html#TYPEkey">key</a> -> 'a</code></pre><div class="info ">
                    <div class="not-examples">
                    <code class="code">unsafeGet dict key</code> return the value if the <code class="code">key</code> exists, 
    otherwise an <b>undefined</b> value is returned. Must be used only 
    when the existence of a key is certain. (i.e. when having called <code class="code">keys</code>
    function previously.<br>
