∀ {B : Type u₁} [inst : CategoryTheory.Bicategory B] {C : Type u₂} [inst_1 : CategoryTheory.Bicategory C]
  {F G : CategoryTheory.LaxFunctor B C} {η θ : F ⟶ G} [inst_2 : SizeOf B] [inst_3 : SizeOf C]
  (as : CategoryTheory.Lax.OplaxTrans.Modification η θ), sizeOf { as := as } = 1 + sizeOf as