&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">type</span>&nbsp;t<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;compare&nbsp;:&nbsp;<span class="constructor">Map</span>.<span class="constructor">OrderedType</span>.t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="constructor">Map</span>.<span class="constructor">OrderedType</span>.t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">end</span><br>
&nbsp;&n