code: def tokenize(self, string: str) -> List[str]:
      return [
          token if token in self.tokens_to_ids else self.unk_token
          for token in string.split()
      ]
  
file_path: jiant/jiant/utils/testing/tokenizer.py
imports: from typing import List
  from jiant.utils.python.datastructures import BiMap
  from jiant.tasks.core import FeaturizationSpec
label_desc: Use image node_id 3 for calling the SimpleSpaceTokenizer obj's underlying member method code with example usage: obj.tokenize(string) and returns: unknown