" class="extype">F</span>, <span name="provingground.induction.ExstInducStrucs.IndConsSeqExst.Index" class="extype">Index</span>, <span name="provingground.induction.ExstInducStrucs.IndConsSeqExst.Intros" class="extype">Intros</span>]</span></span></li><li class="indented0 " name="scala.Predef.Ensuring#ensuring" group="Ungrouped" fullComment="yes" data-isabs="false" visbl="pub"><a id="ensuring(cond:A=&gt;Boolean,msg:=&gt;Any):A"></a><a id="ensuring((IndConsSeqExst[SS,H,F,Index,Intros])=&gt;Boolean,=&gt;Any)