fn dirReadUnimplemented(userdata: ?*anyopaque, dir_reader: *Dir.Reader, buffer: []Dir.Entry) Dir.Reader.Error!usize
fn dirReadUnimplemented(userdata: ?*anyopaque, dir_reader: *Dir.Reader, buffer: []Dir.Entry) Dir.Reader.Error!usize { _ = userdata; _ = dir_reader; _ = buffer; return error.Unexpected; }