SMPPEX.Pdu.ref
You're seeing just the function
ref, go back to SMPPEX.Pdu module for more information.
Returns Pdu's unique reference ref.
Examples
iex(1)> pdu = SMPPEX.Pdu.new({1, 4, 123})
iex(2)> is_reference SMPPEX.Pdu.ref(pdu)
true