stat method
Asynchronously calls the operating system's stat() function on path
.
Returns a Future which completes with a io.FileStat object containing
the data returned by stat().
If the call fails, completes the future with a io.FileStat object with
.type set to FileSystemEntityType.NOT_FOUND and the other fields invalid.
Implementation
@override
Future<io.FileStat> stat(String path) => io.FileStat.stat(path);