/*
 * This material is distributed under the GNU General Public License
 * Version 2. You may review the terms of this license at
 * http://www.gnu.org/licenses/gpl-2.0.html
 *
 * Copyright (c) 1995-1997, Robert Gentleman and Ross Ihaka
 * Copyright (c) 1998, Ross Ihaka
 * Copyright (c) 1998-2012, The R Core Team
 * Copyright (c) 2005, The R Foundation
 * Copyright (c) 2013, 2014, Oracle and/or its affiliates
 *
 * All rights reserved.
 */