MLLP.Envelope.wrap_message

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

wrap_message(message)

Specs

wrap_message(binary()) :: binary() | no_return()

Wraps a string message in the MLLP start-of-block and end-of-block characters

Example: iex> MLLP.Envelope.wrap_message "hi" <<11, 104, 105, 28, 13>>