(motive : Option (Std.HashMap Lean.MVarId Lean.MVarId) → Sort u_1) →
  (__discr : Option (Std.HashMap Lean.MVarId Lean.MVarId)) →
    ((val : Std.HashMap Lean.MVarId Lean.MVarId) → motive (some val)) →
      ((x : Option (Std.HashMap Lean.MVarId Lean.MVarId)) → motive x) → motive __discr