<span>dir:<span>[ `Increasing <span>| `Decreasing</span> ]</span></span> <span>&#45;&gt;</span> <span><span>(<span class="type-var">'b</span>, <span class="type-var">'v</span>, <span class="type-var">'a</span>)</span> <a href="../Types/index.html#type-below_above">Types.below_above</a></span> <span>&#45;&gt;</span> <span><span>(<span class="type-var">'b</span>, <span class="type-var">'v</span>, <span class="type-var">'a</span>)</span> <a href="../Types/index.html#type-below_above">Types.below_above</a><