>Build_path_prefix_map</span>.path_prefix,&nbsp;<span class="constructor">Build_path_prefix_map</span>.error_message)<br>
&nbsp;&nbsp;&nbsp;&nbsp;<span class="constructor">Pervasives</span>.result<br>
&nbsp;&nbsp;<span class="keyword">type</span>&nbsp;pair&nbsp;=&nbsp;{<br>
&nbsp;&nbsp;&nbsp;&nbsp;target&nbsp;:&nbsp;<span class="constructor">Build_path_prefix_map</span>.path_prefix;<br>
&nbsp;&nbsp;&nbsp;&nbsp;source&nbsp;:&nbsp;<span class="constructor">Build_path_prefix_map</span>.path_prefix;<br>
&nbsp;&