;out_channel_of_descr&nbsp;:&nbsp;<span class="constructor">UnixLabels</span>.file_descr&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="constructor">Pervasives</span>.out_channel<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;descr_of_in_channel&nbsp;:&nbsp;<span class="constructor">Pervasives</span>.in_channel&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="constructor">UnixLabels</span>.file_descr<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;descr_of_out_channe