Returns all keys for the group name @group_name. The array of
returned keys will be %NULL-terminated, so @length may
optionally be %NULL. In the event that the @group_name cannot
be found, %NULL is returned and @error is set to
#G_KEY_FILE_ERROR_GROUP_NOT_FOUND.
Returns all keys for the group name @group_name. The array of returned keys will be %NULL-terminated, so @length may optionally be %NULL. In the event that the @group_name cannot be found, %NULL is returned and @error is set to #G_KEY_FILE_ERROR_GROUP_NOT_FOUND.