#  Copyright (c) 1997-2021
#  Ewgenij Gawrilow, Michael Joswig, and the polymake team
#  Technische Universität Berlin, Germany
#  https://polymake.org
#
#  This program is free software; you can redistribute it and/or modify it
#  under the terms of the GNU General Public License as published by the
#  Free Software Foundation; either version 2, or (at your option) any
#  later version: http://www.gnu.org/licenses/gpl.txt.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#-------------------------------------------------------------------------------


upgrade 4.4.1 topaz::HyperbolicSurface = \&convert_dcel_data;

sub convert_dcel_data {
   my($hs) = @_;
   my $found = 0;

   if(defined(my $prop = delete $hs->{DCEL_DATA})){
      $found = 1;
      $hs->{DCEL} = [$prop];
   }
   return $found;
}



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