# File lib/declarative_authorization/development_support/change_supporter.rb, line 145
        def affected_users (original_engine, original_users, privilege, context)
          (0...@users.length).select do |i|
            original_engine.permit?(privilege, :context => context,
              :skip_attribute_test => true, :user => original_users[i]) !=
                @engine.permit?(privilege, :context => context,
                  :skip_attribute_test => true, :user => @users[i])
          end.collect {|i| original_users[i]}
        end