sp;stats&nbsp;:&nbsp;(<span class="keywordsign">'</span>a,&nbsp;<span class="keywordsign">'</span>b)&nbsp;<span class="constructor">Hashtbl</span>.t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="constructor">Hashtbl</span>.statistics<br>
&nbsp;&nbsp;<span class="keyword">module</span>&nbsp;<span class="keyword">type</span>&nbsp;<span class="constructor">HashedType</span>&nbsp;=<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">sig</span><br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="k