∀ {C₁ : Type u_1} {C₂ : Type u_2} {C₃ : Type u_3} {C₄ : Type u_4} {C₂₃ : Type u_6}
  [inst : CategoryTheory.Category.{v_1, u_1} C₁] [inst_1 : CategoryTheory.Category.{v_2, u_2} C₂]
  [inst_2 : CategoryTheory.Category.{v_3, u_3} C₃] [inst_3 : CategoryTheory.Category.{v_4, u_4} C₄]
  [inst_4 : CategoryTheory.Category.{v_6, u_6} C₂₃] (F : CategoryTheory.Functor C₁ (CategoryTheory.Functor C₂₃ C₄))
  (G₂₃ : CategoryTheory.Functor C₂ (CategoryTheory.Functor C₃ C₂₃)) {I₁ : Type u_7} {I₂ : Type u_8} {I₃ : Type u_9}
  {J : Type u_10} {r : I₁ × I₂ × I₃ → J} (ρ₂₃ : CategoryTheory.GradedObject.BifunctorComp₂₃IndexData r)
  (X₁ : CategoryTheory.GradedObject I₁ C₁) (X₂ : CategoryTheory.GradedObject I₂ C₂)
  (X₃ : CategoryTheory.GradedObject I₃ C₃)
  [inst_5 : (((CategoryTheory.GradedObject.mapBifunctor G₂₃ I₂ I₃).obj X₂).obj X₃).HasMap ρ₂₃.p]
  [inst_6 :
    (((CategoryTheory.GradedObject.mapBifunctor F I₁ ρ₂₃.I₂₃).obj X₁).obj
          (CategoryTheory.GradedObject.mapBifunctorMapObj G₂₃ ρ₂₃.p X₂ X₃)).HasMap
      ρ₂₃.q]
  [H : CategoryTheory.GradedObject.HasGoodTrifunctor₂₃Obj F G₂₃ ρ₂₃ X₁ X₂ X₃]
  [inst_7 :
    ((((CategoryTheory.GradedObject.mapTrifunctor (CategoryTheory.bifunctorComp₂₃ F G₂₃) I₁ I₂ I₃).obj X₁).obj X₂).obj
          X₃).HasMap
      r]
  (i₁ : I₁) (i₂ : I₂) (i₃ : I₃) (j : J) (h : r (i₁, i₂, i₃) = j),
  CategoryTheory.CategoryStruct.comp
      (CategoryTheory.GradedObject.ιMapBifunctorBifunctor₂₃MapObj F G₂₃ ρ₂₃ X₁ X₂ X₃ i₁ i₂ i₃ j h)
      ((CategoryTheory.GradedObject.mapBifunctorComp₂₃MapObjIso F G₂₃ ρ₂₃ X₁ X₂ X₃).inv j) =
    CategoryTheory.GradedObject.ιMapTrifunctorMapObj (CategoryTheory.bifunctorComp₂₃ F G₂₃) r X₁ X₂ X₃ i₁ i₂ i₃ j h