add_status_code_handler

Description:

public uint add_status_code_handler (string @signal, uint status_code, Callback callback)

Adds a signal handler to this for signal.

Similar to [func@GObject.signal_connect], but the callback will only be run if this has the status status_code.

signal must be a signal that will be emitted after this's status is set (this means it can't be a "wrote" signal).

this	a Message
status_code	status code to match against
callback	the header handler
signal	signal to connect the handler to.
user_data	data to pass to `handler_cb`

the handler ID from [func@GObject.signal_connect]