Sippet.Message.fetch_header_front-exclamation-mark
You're seeing just the function
fetch_header_front-exclamation-mark
, go back to Sippet.Message module for more information.
Specs
fetch_header_front!(t(), header()) :: multiple_value() | no_return()
Fetches the first value of a specific header
in the given message
, erroring
out if message
doesn't contain header
.
If message
contains the given header
, the first value is returned, which
may be nil
case the values list is empty. If message
doesn't contain the
header
, a KeyError
exception is raised.