This is similar to gtk_buildable_parser_finished() but is called once for each custom tag handled by the buildable. Since 2.12
a GtkBuilder
child object or NULL for non-child tags. [allow-none]
the name of the tag
user data created in custom_tag_start
See Implementation
This is similar to gtk_buildable_parser_finished() but is called once for each custom tag handled by the buildable. Since 2.12