A key in the "thumbnail" namespace for checking whether the thumbnail is outdated.
This attribute is %TRUE if the thumbnail is up-to-date with the file it represents,
and %FALSE if the file has been modified since the thumbnail was generated.
If %G_FILE_ATTRIBUTE_THUMBNAILING_FAILED is %TRUE and this attribute is %FALSE,
it indicates that thumbnailing may be attempted again and may succeed.
Corresponding #GFileAttributeType is %G_FILE_ATTRIBUTE_TYPE_BOOLEAN.
A key in the "thumbnail" namespace for checking whether the thumbnail is outdated. This attribute is %TRUE if the thumbnail is up-to-date with the file it represents, and %FALSE if the file has been modified since the thumbnail was generated.
If %G_FILE_ATTRIBUTE_THUMBNAILING_FAILED is %TRUE and this attribute is %FALSE, it indicates that thumbnailing may be attempted again and may succeed.
Corresponding #GFileAttributeType is %G_FILE_ATTRIBUTE_TYPE_BOOLEAN.