"constructor">Bopt</span>.t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="keywordsign">'</span>c&nbsp;<span class="constructor">Bopt</span>.t<br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;flatMap&nbsp;:&nbsp;(<span class="keywordsign">'</span>a&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="keywordsign">'</span>b&nbsp;<span class="constructor">Bopt</span>.t)&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="keywordsign">'</span>a&nbsp;<span class="construct