expected (REXML::Validation::Choice)

    # File temp/validation/relaxng.rb, line 411
          def expected
            #puts "IN CHOICE EXPECTED"
            #puts "EVENTS = #{@events.inspect}"
            return [@events[@current]] if @events.size > 0
            return @choices.collect do |x|
              if x[0].kind_of? State
                x[0].expected
              else
                x[0]
              end
            end.flatten
          end