close(reference() | pid() | map()) :: :ok

request(atom(), String.t(), [tuple()], String.t(), list()) ::
  {:ok, pos_integer(), [tuple()], reference() | map()}
  | {:ok, pos_integer(), [tuple()]}
  | {:ok, reference()}
  | {:error, term()}

stream_body(reference() | pid() | map()) ::
  {:ok, binary()} | :done | {:error, String.t()}