Sippet.Message.update_header_front
You're seeing just the function
update_header_front
, go back to Sippet.Message module for more information.
Specs
update_header_front( t(), header(), value() | nil, (multiple_value() -> multiple_value()) ) :: t()
Updates the first header
value in message
with the given function.
If header
is present in message
with value [value]
, fun
is invoked
with for first element of [value]
and its result is used as the new value
of header
front. If header
is not present in message
, or it is an empty
list, initial
is inserted as the single value of header
.