mber is added by an implicit conversion from <a href="" name="provingground.interface.Display" id="provingground.interface.Display" class="extype">Display</a>[<span name="provingground.interface.Display.A" class="extype">A</span>] to<span name="scala.Predef.Ensuring" class="extype">Ensuring</span>[<a href="" name="provingground.interface.Display" id="provingground.interface.Display" class="extype">Display</a>[<span name="provingground.interface.Display.A" class="extype">A</span>]] performed by method Ensuri