Flowdock
sort_if_need() private

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# File lib/rss/maker/base.rb, line 691
      def sort_if_need
        if @do_sort.respond_to?(:call)
          @items.sort do |x, y|
            @do_sort.call(x, y)
          end
        elsif @do_sort
          @items.sort do |x, y|
            y <=> x
          end
        else
          @items
        end
      end
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