al</span> (&gt;=&gt;) : <span>(<span class="type-var">'a</span> <span>&#45;&gt;</span> <span><span class="type-var">'b</span> <a href="../argument-1-M/index.html#type-t">M.t</a></span>)</span> <span>&#45;&gt;</span> <span>(<span class="type-var">'b</span> <span>&#45;&gt;</span> <span><span class="type-var">'c</span> <a href="../argument-1-M/index.html#type-t">M.t</a></span>)</span> <span>&#45;&gt;</span> <span class="type-var">'a</span> <span>&#45;&gt;</span> <span><span class="type-var">'c</span> <a href="