code: def numericalize(self, t:Collection[str]) -> List[int]:
          "Convert a list of tokens `t` to their ids."
          return [self.stoi[w] for w in tf numericalize(self, t:Collection[str]) -> List[int]:
          "Convert a list of tokens `t` to their ids."
          return [self.stoi[w] for w in t]
docs: Convert a list of tokens `t` to their ids.