∀ {X : Type u_1} [inst : PseudoMetricSpace X] {m0 : MeasurableSpace X} {μ : MeasureTheory.Measure X}
  (v : VitaliFamily μ) {x : X} {P : Set X → Prop},
  (∃ᶠ (t : Set X) in v.filterAt x, P t) ↔ ∀ ε > 0, ∃ t ∈ v.setsAt x, t ⊆ Metric.closedBall x ε ∧ P t