pop
Completes the process of a temporary sub-parser redirection.
This function exists to collect the user_data allocated by a matching call to gtk_buildable_parse_context_push(). It must be called in the end_element handler corresponding to the start_element handler during which gtk_buildable_parse_context_push() was called. You must not call this function from the error callback -- the
Return
the user data passed to gtk_buildable_parse_context_push()