Copyright: Copyright (C) 1994-2020 Werner Lemberg <email@example.com>
Copyright: Copyright (C) 2002 Dominique Unruh
Copyright: Copyright (C) 1993-2005 Ross Paterson
Copyright: Copyright (C) 1998-2003 Anthony FOK
Copyright (C) 2003-2016 Danai SAE-HAN
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