∀ {R : Type u_1} {E : Type u_2} [inst : Semiring R] [inst_1 : InvolutiveStar R] [inst_2 : AddCommMonoid E]
  [inst_3 : Module R E] [inst_4 : StarAddMonoid E] [inst_5 : StarModule R E] {f : WithConv (Module.End R E)},
  IsUnit (star f).ofConv = IsUnit f.ofConv