STANDARD_IS_BACKUP

A key in the "standard" namespace for checking if a file is a backup file.

The exact semantics of what constitutes a backup file are backend-specific. For local files, a file is considered a backup if its name ends with `~` and it is a regular file. This follows the POSIX convention used by text editors such as Emacs.

Corresponding FileAttributeType is g_file_attribute_type_boolean.