@Override
  public SeekableByteChannel newByteChannel(
      Path path, Set<? extends OpenOption> options, FileAttribute<?>... attrs) throws IOException {
    checkOpen();
    JimfsPath checkedPath = checkPath(path);
    ImmutableSet<OpenOption> opts = Options.getOptionsForChannel(options);
    return new JimfsFileChannel(
        view.getOrCreateRegularFile(checkedPath, opts), opts, fileSystemState);
  }
A stream filter that always returns true.
jimfs/src/main/java/com/google/common/jimfs/JimfsSecureDirectoryStream.java