{C : Type u} →
  [inst : CategoryTheory.Category.{v, u} C] →
    {G : CategoryTheory.Functor Cᵒᵖ GrpCat} →
      {I : Type w'} →
        {U : I → C} →
          (toOneCochain : CategoryTheory.PresheafOfGroups.OneCochain G U) →
            autoParam
                (∀ (i j k : I) ⦃T : C⦄ (a : T ⟶ U i) (b : T ⟶ U j) (c : T ⟶ U k),
                  toOneCochain.ev i j a b * toOneCochain.ev j k b c = toOneCochain.ev i k a c)
                CategoryTheory.PresheafOfGroups.OneCocycle.ev_trans._autoParam →
              CategoryTheory.PresheafOfGroups.OneCocycle G U