(motive : Option (Array (Lean.TSyntax `Lean.Parser.Tactic.configItem)) → Sort u_1) →
  (x : Option (Array (Lean.TSyntax `Lean.Parser.Tactic.configItem))) →
    ((configItems : Array (Lean.TSyntax `Lean.Parser.Tactic.configItem)) → motive (some configItems)) →
      (Unit → motive none) → motive x