∀ {ι : Type u_1} [inst : LinearOrder ι] [inst_1 : LocallyFiniteOrder ι] [inst_2 : DecidableLE ι] {X : ι → Type u_2}
  [inst_3 : LocallyFiniteOrderBot ι] [inst_4 : (i : ι) → MeasurableSpace (X i)] {a b : ι} (hab : a ≤ b),
  ⇑(MeasurableEquiv.IicProdIoc hab) = IicProdIoc a b