∀ {C : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} C] [inst_1 : CategoryTheory.MonoidalCategory C]
  [inst_2 : CategoryTheory.SymmetricCategory C],
  CategoryTheory.Mon.instSymmetricCategory =
    { braiding := fun X Y => CategoryTheory.Mon.mkIso' (β_ X.X Y.X), braiding_naturality_right := ⋯,
      braiding_naturality_left := ⋯, hexagon_forward := ⋯, hexagon_reverse := ⋯, symmetry := ⋯ }