code: def svalue(self):
          
  
          result = self._svalue
  
          if result is None:  # try to get svalue from value if svalue is None
  
              try:
                  value = self.value
  
              except Parameter.Error:
                  pass
  
              else:
                  result = self._svalue = self.serializer(value)
  
          return result
docs: Get serialized value.
  
          :rtype: str