MLLP.Ack.get_ack_for_message

You're seeing just the function get_ack_for_message, go back to MLLP.Ack module for more information.
Link to this function

get_ack_for_message(message, code, text_message \\ "")

Specs

get_ack_for_message(
  message :: HL7.Message.t() | String.t(),
  acknowledgement_code :: atom() | String.t(),
  text_message :: String.t()
) :: HL7.Message.t()

Gets the ack message for a given message and its application status