∀ {α : Type u_1} {β : Type u_2} {γ : Type u_3} {mα : MeasurableSpace α} {mβ : MeasurableSpace β}
  {mγ : MeasurableSpace γ} {f : α → β} (hf : Measurable f) {g : β → γ} (hg : Measurable g),
  (ProbabilityTheory.Kernel.deterministic f hf).map g = ProbabilityTheory.Kernel.deterministic (g ∘ f) ⋯