LE</a> <span class="keyword">with</span> <span class="keyword">type</span> <span>('a, 'b) <a href="module-type-BITRAVERSABLE_F/index.html#type-t">t</a></span> = <span><span>(<span class="type-var">'a</span>, <span class="type-var">'b</span>)</span> Stdlib.result</span> <span class="keyword">and</span> <span class="keyword">type</span> <span>'a <a href="module-type-BITRAVERSABLE_F/index.html#type-applicative_t">applicative_t</a></span> = <span><span class="type-var">'a</span> <a href="module-type-BITRAVERSA