∀ {Ω : Type u_1} {ι : Type u_2} {inst : Preorder ι} {m : MeasurableSpace Ω} {seq : ι → MeasurableSpace Ω}
  {mono' : Monotone seq} {le' : ∀ (i : ι), seq i ≤ m} {seq_1 : ι → MeasurableSpace Ω} {mono'_1 : Monotone seq_1}
  {le'_1 : ∀ (i : ι), seq_1 i ≤ m},
  { seq := seq, mono' := mono', le' := le' } = { seq := seq_1, mono' := mono'_1, le' := le'_1 } → seq = seq_1