code: def appendChild(self, param):
          ''' Overrides base class.
          '''
          Symbol.appendChild(self, param)
          if param.offset is None:
              param.offset = self.size
              self.size += param.sizf appendChild(self, param):
          ''' Overrides base class.
          '''
          Symbol.appendChild(self, param)
          if param.offset is None:
              param.offset = self.size
              self.size += param.size
docs: Overrides base class.