rrow">&#45;&gt;</span></span> <span><span class="type-var">'a</span> <span class="arrow">&#45;&gt;</span></span> <span class="type-var">'b</span></span></code></div></div><div class="odoc-spec"><div class="spec module-type anchored" id="module-type-FOREIGN"><a href="#module-type-FOREIGN" class="anchor"></a><code><span><span class="keyword">module</span> <span class="keyword">type</span> FOREIGN</span><span> = <span class="xref-unresolved">Ctypes</span>.FOREIGN</span></code></div></div><div class="odoc-spec"