(motive : Option Lean.Server.FileWorker.PendingRequest → Sort u_1) →
  (x : Option Lean.Server.FileWorker.PendingRequest) →
    ((r : Lean.Server.FileWorker.PendingRequest) → motive (some r)) →
      ((x : Option Lean.Server.FileWorker.PendingRequest) → motive x) → motive x