ss="modifier"></span> <span class="kind">def</span></span> <span class="symbol"><span class="name" title="gt4s: $up$colon">^:</span><span class="params">(<span name="that">that: ((<span name="provingground.learning.AdjDiffbleFunction.Oplus.B" class="extype">B</span>, <span name="provingground.learning.AdjDiffbleFunction.Oplus.D" class="extype">D</span>)) =&gt; (<span name="provingground.learning.AdjDiffbleFunction.Oplus.B" class="extype">B</span>, <span name="provingground.learning.AdjDiffbleFunction.Oplus.