text: __author__ = 'sarangis'
  
  class Value:
      def __init__(self):
          pass
  
  class Argument(Value):
      def __init__(self, name):
          Value.__init__(self)
          self.__name = name
          self.uses = []
  
      @property
      def name(self):
          return self.__name
  
      def __str__(self):
          return self.__name
  
      __repr__ = __str__