∀ {α : Type u_1} {ι : Type u_2} [inst : GeneralizedBooleanAlgebra α] [inst_1 : LinearOrder ι]
  [inst_2 : LocallyFiniteOrderBot ι] {f d : ι → α},
  Pairwise (Function.onFun Disjoint d) → partialSups d = partialSups f → d = disjointed f