Returns the time the file was created in nanoseconds since UTC 1970-01-01 On Windows, this cannot return null On Linux, this returns null if the filesystem does not support creation times, or if the kernel is older than 4.11 On Unices, this returns null if the filesystem or OS does not support creation times On MacOS, this returns the ctime if the filesystem does not support creation times; this is insanity, and yet another reason to hate on Apple