class Parser::Ruby33

def _reduce_401(val, _values, result) 

def _reduce_401(val, _values, result)
                      if val[1].empty? && val[0].size == 1
                        result = [@builder.procarg0(val[0][0])]
                      else
                        result = val[0].concat(val[1])
                      end

    result
end