{α : Type u} →
  {β : Type v} →
    [inst : Ord α] →
      {motive : Std.DTreeMap.Internal.Const.RicSliceData α β → Sort u_1} →
        ((treeMap : Std.DTreeMap.Internal.Impl α fun x => β) →
            (range : Std.Ric α) → motive { treeMap := treeMap, range := range }) →
          (t : Std.DTreeMap.Internal.Const.RicSliceData α β) → motive t