expand_ref_in

# File lib/rexml/validation/relaxng.rb, line 198
      def expand_ref_in( arry, ind )
        new_events = []
        @references[ arry[ind].to_s ].each{ |evt|
          add_event_to_arry(new_events,evt)
        }
        arry[ind,1] = new_events
      end