gt;</span><span class="tparams">[<span name="B">B</span>]</span><span class="params">(<span name="y">y: <span name="scala.Predef.ArrowAssoc.-&gt;.B" class="extype">B</span></span>)</span><span class="result">: (<a href="" name="provingground.induction.coarse.ConstructorSeq.Empty" id="provingground.induction.coarse.ConstructorSeq.Empty" class="extype">Empty</a>[<span name="provingground.induction.coarse.ConstructorSeq.Empty.C" class="extype">C</span>, <span name="provingground.induction.coarse.ConstructorSeq