Future<FileStat> stat(String path)

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

Source 

static Future<FileStat> stat(String path) {
  // Trailing path is not supported on Windows.
  if (Platform.isWindows) {
    path = FileSystemEntity._trimTrailingPathSeparators(path);
  }
  return _IOService._dispatch(_FILE_STAT, [path]).then((response) {
    if (_isErrorResponse(response)) {
      return FileStat._notFound;
    }
    // Unwrap the real list from the "I'm not an error" wrapper.
    List data = response[1];
    return new FileStat._internal(
        new DateTime.fromMillisecondsSinceEpoch(data[_CHANGED_TIME]),
        new DateTime.fromMillisecondsSinceEpoch(data[_MODIFIED_TIME]),
        new DateTime.fromMillisecondsSinceEpoch(data[_ACCESSED_TIME]),
        FileSystemEntityType._lookup(data[_TYPE]),
        data[_MODE],
        data[_SIZE]);
  });
}