# File lib/rubyrep/syncers/two_way_syncer.rb, line 86
      def validate_logging_options(options)
        values = [options].flatten # ensure that I have an array
        values.each do |value|
          unless [:ignored_changes, :all_changes, :ignored_conflicts, :all_conflicts].include? value
            raise ArgumentError.new("#{value.inspect} not a valid :logged_sync_events option")
          end
        end
      end