{motive_1 : Lean.Language.SnapshotTree → Sort u} →
  {motive_2 : Array (Lean.Language.SnapshotTask Lean.Language.SnapshotTree) → Sort u} →
    {motive_3 : List (Lean.Language.SnapshotTask Lean.Language.SnapshotTree) → Sort u} →
      {motive_4 : Lean.Language.SnapshotTask Lean.Language.SnapshotTree → Sort u} →
        {motive_5 : Task Lean.Language.SnapshotTree → Sort u} →
          List (Lean.Language.SnapshotTask Lean.Language.SnapshotTree) → Sort (max 1 u)