∀ {C : Type u_1} [inst : CategoryTheory.Category.{u_4, u_1} C] {I : Type u_2} {D : I → Type u_3}
  [inst_1 : (i : I) → CategoryTheory.Category.{u_5, u_3} (D i)] {F : (i : I) → CategoryTheory.Functor C (D i)},
  CategoryTheory.JointlyReflectIsomorphisms F →
    ∀ [∀ (i : I), CategoryTheory.Limits.PreservesColimitsOfShape CategoryTheory.Limits.WalkingSpan (F i)]
      [CategoryTheory.Limits.HasPushouts C], CategoryTheory.JointlyReflectEpimorphisms F