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add_listener( listener ) public

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# File lib/rexml/parsers/baseparser.rb, line 113
      def add_listener( listener )
        if !defined?(@listeners) or !@listeners
          @listeners = []
          instance_eval "alias :_old_pull :pull\ndef pull\nevent = _old_pull\n@listeners.each do |listener|\nlistener.receive event\nend\nevent\nend\n"
        end
        @listeners << listener
      end
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