r</span> (<a href="Distributive_Lattice/argument-1-Ok/index.html">Ok</a> : <a href="../../Interface/index.html#module-type-LATTICE">Interface.LATTICE</a>) <span>&#45;&gt;</span> <span class="keyword">functor</span> (<a href="Distributive_Lattice/argument-2-Error/index.html">Error</a> : <a href="../../Interface/index.html#module-type-LATTICE">Interface.LATTICE</a>) <span>&#45;&gt;</span> <span class="keyword">sig</span> ... <span class="keyword">end</span></code></div><div class="spec module" id="module-Boun