{α : Type u} →
  {β : Type v} →
    {inst : Ord α} →
      {P : Sort u_1} →
        {treeMap : Std.DTreeMap.Internal.Impl α fun x => β} →
          {range : Std.Ric α} →
            {treeMap' : Std.DTreeMap.Internal.Impl α fun x => β} →
              {range' : Std.Ric α} →
                { treeMap := treeMap, range := range } = { treeMap := treeMap', range := range' } →
                  (treeMap ≍ treeMap' → range ≍ range' → P) → P