ean" class="extype">Boolean</span></span>, <span name="msg">msg: =&gt; <span name="scala.Any" class="extype">Any</span></span>)</span><span class="result">: <a href="" name="provingground.induction.coarse.ConstructorDefn" id="provingground.induction.coarse.ConstructorDefn" class="extype">ConstructorDefn</a>[<span name="provingground.induction.coarse.ConstructorDefn.U" class="extype">U</span>, <span name="provingground.induction.coarse.ConstructorDefn.C" class="extype">C</span>, <span name="provingground.ind