span>.in_channel&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int64<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;in_channel_length&nbsp;:&nbsp;<span class="constructor">Pervasives</span>.in_channel&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int64<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">end</span><br>
&nbsp;&nbsp;<span class="keyword">type</span>&nbsp;<span class="keywordsign">'</span>a&nbsp;ref&nbsp;=&nbsp;{&nbsp;<span class="keyword">mutable</span>&nbsp;