MLLP.Envelope.eb_cr
You're seeing just the function
eb_cr, go back to MLLP.Envelope module for more information.
Link to this function
eb_cr()
In MLLP, each message ends with eb and cr. The eb_cr is just a simple concatenation of eb and cr.
Examples
iex> MLLP.Envelope.eb_cr
<<28, 13>>