stat method Null safety
Calls the operating system's stat() function on path.
Identical to FileStat.stat(this.path).
Returns a Future<FileStat> object containing the data returned by
stat().
If the call fails, completes the future with a FileStat object
with .type set to FileSystemEntityType.notFound and the other fields
invalid.
Implementation
Future<FileStat> stat() => FileStat.stat(path);