public const string UNIX_MODE
A key in the "unix" namespace for getting the mode of the file (e.
g. whether the file is a regular file, symlink, etc).
See the documentation for `lstat()`: this attribute is equivalent to the `st_mode` member of `struct stat`, and includes both the file type and permissions.
This attribute is only available for UNIX file systems.
Corresponding FileAttributeType is g_file_attribute_type_uint32.