bsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;char&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;option<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;rindex_from&nbsp;:&nbsp;bytes&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;char&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;int<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;rindex_from_opt&nbsp;:&nbsp;bytes&nbsp;<spa