∀ {α : Type u_1} {β : Type u_2} {F : Type u_4} [inst : EMetricSpace α] [inst_1 : FunLike F α β] [CompleteSpace α]
  [inst_3 : EMetricSpace β] [DilationClass F α β] (f : F), Topology.IsClosedEmbedding ⇑f