lt<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;toList&nbsp;:&nbsp;<span class="keywordsign">'</span>a&nbsp;<span class="constructor">Bopt</span>.t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="keywordsign">'</span>a&nbsp;list<br>
&nbsp;&nbsp;<span class="keyword">type</span>&nbsp;<span class="keywordsign">'</span>a&nbsp;sequence&nbsp;=&nbsp;(<span class="keywordsign">'</span>a&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;unit)&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;un