∀ {α : Type u_1} {β : Type u_2} {ι : Type u_4} [inst : UniformSpace β] {F : ι → α → β} {f : α → β} {s : Set α}
  {p : Filter ι},
  TendstoUniformlyOn F f p s ↔ Filter.Tendsto (fun q => (f q.2, F q.1 q.2)) (p ×ˢ Filter.principal s) (uniformity β)