∀ {E : Type u_1} [inst : MeasurableSpace E] {μ : MeasureTheory.Measure E} {Ω : Type u_2} {x : MeasurableSpace Ω}
  {ℙ : MeasureTheory.Measure Ω} {X : Ω → E} {s : Set E},
  MeasureTheory.pdf.IsUniform X (MeasureTheory.toMeasurable μ s) ℙ μ ↔ MeasureTheory.pdf.IsUniform X s ℙ μ