Flowdock
once(*ids) private

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# File lib/date.rb, line 1005
    def once(*ids) # :nodoc:
      for id in ids
        module_eval "alias_method :__\#{id.to_i}__, :\#{id.to_s}\nprivate :__\#{id.to_i}__\ndef \#{id.to_s}(*args, &block)\n(@__\#{id.to_i}__ ||= [__\#{id.to_i}__(*args, &block)])[0]\nend\n"
      end
    end
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