∀ (vPos hPosSrc hPosTar : ℕ) (id : Mathlib.Tactic.BicategoryLike.Atom₁),
  sizeOf { vPos := vPos, hPosSrc := hPosSrc, hPosTar := hPosTar, id := id } =
    1 + sizeOf vPos + sizeOf hPosSrc + sizeOf hPosTar + sizeOf id