∀ {B : Type u₁} [inst : CategoryTheory.Bicategory B] {C : Type u₂} [inst_1 : CategoryTheory.Bicategory C]
  {F G : CategoryTheory.Pseudofunctor B C} (α : F ⟶ G) (a : B),
  (α.naturality (CategoryTheory.CategoryStruct.id a)).hom =
    CategoryTheory.CategoryStruct.comp (CategoryTheory.Bicategory.whiskerRight (F.mapId a).hom (α.app a))
      (CategoryTheory.CategoryStruct.comp (CategoryTheory.Bicategory.leftUnitor (α.app a)).hom
        (CategoryTheory.CategoryStruct.comp (CategoryTheory.Bicategory.rightUnitor (α.app a)).inv
          (CategoryTheory.Bicategory.whiskerLeft (α.app a) (G.mapId a).inv)))