string&nbsp;array&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;unit&nbsp;<span class="constructor">BsAsyncMonad</span>.<span class="constructor">Callback</span>.t<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">type</span>&nbsp;subscription<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">type</span>&nbsp;flow_control&nbsp;=&nbsp;{&nbsp;maxBytes&nbsp;:&nbsp;int;&nbsp;maxMessages&nbsp;:&nbsp;int;&nbsp;}<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">type</span>&n