+ validate_bool($notify_update)
+
+ $title_array = split($title, '-')
+ $setting_type = $title_array[0]
+ $base_name = join(delete_at($title_array, 0), '-')
+
+ validate_re($setting_type, ['\Aconf\z', '\Apref\z', '\Alist\z'], "apt::setting resource name/title must start with either 'conf-', 'pref-' or 'list-'")