&nbsp;mkdir&nbsp;:&nbsp;string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;unit<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;flock&nbsp;:&nbsp;string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;unit<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;funlock&nbsp;:&nbsp;string&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;unit<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;download&nbsp;:&nbsp;overwrite:bool&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;filename:string&nbsp