code: def get_nlp_base(self):
          ''' getter '''
          if isinstance(self.__nlp_base, NlpBase) is False:
              raise TypeError("The type of self.__nlp_base must be NlpBase.")
  
          return self.__nlp_basf get_nlp_base(self):
          ''' getter '''
          if isinstance(self.__nlp_base, NlpBase) is False:
              raise TypeError("The type of self.__nlp_base must be NlpBase.")
  
          return self.__nlp_base
docs: getter