code: def get_stoplisted_unigram_corpus(self, stoplist=None):
          '''
          Parameters
          -------
          stoplist : list, optional
  
          Returns
          -------
          A new TermDocumentMatrix consisting of only unigrams in the current TermDocumentMatrix.
          '''
          if stoplist is None:
              stoplist = self.get_default_stoplist()
          else:
              stoplist = [w.lower() for w in stoplist]
          return self._remove_terms_from_list(stoplistf get_stoplisted_unigram_corpus(self, stoplist=None):
          '''
          Parameters
          -------
          stoplist : list, optional
  
          Returns
          -------
          A new TermDocumentMatrix consisting of only unigrams in the current TermDocumentMatrix.
          '''
          if stoplist is None:
              stoplist = self.get_default_stoplist()
          else:
              stoplist = [w.lower() for w in stoplist]
          return self._remove_terms_from_list(stoplist)
docs: Parameters
          -------
          stoplist : list, optional
  
          Returns
          -------
          A new TermDocumentMatrix consisting of only unigrams in the current TermDocumentMatrix.