@spec bump(String.t(), String.t()) :: {:ok, non_neg_integer()} | {:error, term()}

@spec get(String.t(), String.t(), String.t(), String.t() | nil) ::
  {:ok, String.t()} | :error

@spec list_configs(String.t()) :: {:ok, [String.t()]} | :error

@spec set(
  String.t(),
  String.t(),
  String.t(),
  String.t(),
  String.t(),
  String.t(),
  boolean()
) ::
  :ok | {:error, term()}

@spec unset(String.t(), String.t(), String.t(), [String.t()], String.t(), boolean()) ::
  :ok | {:error, term()}