∀ {k G : Type u} [inst : CommRing k] [inst_1 : Group G] (A : Rep k G) {Z : ModuleCat k}
  (h : ModuleCat.of k (G → ↑A.V) ⟶ Z),
  CategoryTheory.CategoryStruct.comp (ModuleCat.ofHom A.ρ.invariants.subtype)
      (CategoryTheory.CategoryStruct.comp (groupCohomology.d₀₁ A) h) =
    CategoryTheory.CategoryStruct.comp 0 h