docs: def get_dict_tokens_for_termid(self, term_id):
          """
          Returns the tokens ids that are the span of the term specified
          @type term_id: string
          @param term_id: the term idenfier
          @rtype: list
          @return: list of token ids that are the span of the term
          """
          if self.dict_tokens_for_tid is None:
              self.dict_tokens_for_tid = {}
              for term in self.get_terms():
                  self.dict_tokens_for_tid[term.get_id()] = term.get_span().get_span_ids()
  
          return self.dict_tokens_for_tid.get(term_id,[])