∀ {α : Type u_1} {β : Type u_2} {mα : MeasurableSpace α} {mβ : MeasurableSpace β} {γ : Type u_4}
  {mγ : MeasurableSpace γ} (κ : ProbabilityTheory.Kernel α β) {f : β → γ} (hf : Measurable f),
  κ.mapOfMeasurable f hf = κ.map f