Reads a paper size from the group group_name in the key file key_file. Since 2.12
the GKeyFile to retrieve the papersize from
the name ofthe group in the key file to read, or NULL to read the first group
GException on failure. ConstructionException GTK+ fails to create the object.
See Implementation
Reads a paper size from the group group_name in the key file key_file. Since 2.12