∀ {Ω : Type u_1} {𝓧 : Type u_2} {mΩ : MeasurableSpace Ω} {m𝓧 : MeasurableSpace 𝓧} {κ : ProbabilityTheory.Kernel Ω 𝓧}
  {μ : MeasureTheory.Measure Ω} [inst : MeasureTheory.IsFiniteMeasure μ] [inst_1 : ProbabilityTheory.IsFiniteKernel κ]
  [inst_2 : StandardBorelSpace Ω] [inst_3 : Nonempty Ω],
  ((μ.bind ⇑κ).compProd (ProbabilityTheory.posterior κ μ)).bind ⇑(ProbabilityTheory.Kernel.swap 𝓧 Ω) = μ.compProd κ