∀ {α : Type u_1} {γ : Type u_3} [inst : MeasurableSpace α] {μ : MeasureTheory.Measure α} [inst_1 : TopologicalSpace γ]
  [inst_2 : LinearOrder γ] [inst_3 : OrderClosedTopology γ] [inst_4 : Zero γ] (f : α → γ)
  (hf : MeasureTheory.AEStronglyMeasurable f μ),
  (MeasureTheory.AEEqFun.mk f hf).posPart = MeasureTheory.AEEqFun.mk (fun x => max (f x) 0) ⋯