b><br>
<br>
<span style="font-family: monospace;">Arguments: 1: A single element<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2: A set<br>
Returns:&nbsp;&nbsp;&nbsp;Returns $(true) if the element is in the set<br>
</span>

<hr><b>set_is_not_member</b><br>
<br>
<span style="font-family: monospace;">Arguments: 1: A single element<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2: A set<br>
Returns:&nbsp;&nbsp;&nbsp;Returns $(false) if the element is in the set<br