{motive : Mathlib.Linter.UnusedInstancesInType.Parameter✝ → Sort u} →
  (t : Mathlib.Linter.UnusedInstancesInType.Parameter✝¹) →
    ((fvar? type? : Option Lean.Expr) →
        (idx : ℕ) →
          (appearsInTypeProof : Bool) →
            motive { fvar? := fvar?, type? := type?, idx := idx, appearsInTypeProof := appearsInTypeProof }) →
      motive t