∀ {α : Type u_1} {β : Type u_2} [inst : MeasurableSpace α] [inst_1 : MeasurableSpace β] {M : Type u_3}
  [inst_2 : AddCommMonoid M] [inst_3 : TopologicalSpace M] (v : MeasureTheory.VectorMeasure α M) (f : α → β),
  v.map f =
    if hf : Measurable f then
      { measureOf' := fun s => if MeasurableSet s then ↑v (f ⁻¹' s) else 0, empty' := ⋯, not_measurable' := ⋯,
        m_iUnion' := ⋯ }
    else 0