ey, else, evaluates to <code class="computeroutput"><span class="keyword">false</span></code>.
          </p>
<h6>
<a name="fusion.sequence.intrinsic.functions.has_key.h4"></a>
            <span class="phrase"><a name="fusion.sequence.intrinsic.functions.has_key.header"></a></span><a class="link" href="has_key.html#fusion.sequence.intrinsic.functions.has_key.header">Header</a>
          </h6>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class=