# File lib/rubyrep/syncers/two_way_syncer.rb, line 143
      def sync_difference(type, row)
        if type == :left or type == :right
          option_key = type == :left ? :left_record_handling : :right_record_handling
          option = sync_helper.sync_options[option_key]
          log_sync_outcome type, option, row unless option.respond_to?(:call)
          if option == :ignore
            # nothing to do
          elsif option == :delete
            sync_helper.delete_record type, sync_helper.tables[type], row
          elsif option == :insert
            target = (type == :left ? :right : :left)
            sync_helper.insert_record target, sync_helper.tables[target], row
          else #option must be a Proc
            option.call sync_helper, type, row
          end
        else
          option = sync_helper.sync_options[:sync_conflict_handling]
          log_sync_outcome type, option, row unless option.respond_to?(:call)
          if option == :ignore
            # nothing to do
          elsif option == :right_wins
            sync_helper.update_record :left, sync_helper.tables[:left], row[1]
          elsif option == :left_wins
            sync_helper.update_record :right, sync_helper.tables[:right], row[0]
          else #option must be a Proc
            option.call sync_helper, type, row
          end
        end
      end