code: def set_tokenizable_doc(self, value):
          ''' setter '''
          if isinstance(value, TokenizableDoc):
              self.__tokenizable_doc = value
          else:
              raise TypeError(f set_tokenizable_doc(self, value):
          ''' setter '''
          if isinstance(value, TokenizableDoc):
              self.__tokenizable_doc = value
          else:
              raise TypeError()
docs: setter