// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

DateTime toSecondResolution(DateTime dt) {
  if (dt.millisecond == 0) return dt;
  return dt.subtract(Duration(milliseconds: dt.millisecond));
}