test31 = putTree1 {_} {_} {ℕ} {ℕ} (createEmptyRedBlackTreeℕ ℕ ) 1 1
  $ \t -> putTree1 t 2 2
  $ \t -> putTree1 t 3 3
  $ \t -> putTree1 t 4 4
  $ \t -> getRedBlackTree t 4
  $ \t x -> x

-- Just
-- (record
-- { key = 4
-- ; value = 4
-- ; right = Nothing
-- ; left = Nothing
-- ; color = Red
-- })