Specifies if the size of zero returned by the stat command should be considered as undefined.
This property specifies if the size of zero returned by a stat command for a particular file should be considered as undefined. It makes sense to set this property to True, because some operating systems (e.g. Unix-based) return zero size for the files of certain type. For instance, most of the files contained in the /proc directory are reported as 0-sized, while being actually not empty.