code: def get_class(name):
      if name == "spacy":
          return SpacyTokenizer
      if name == "regexp":
          return RegexpTokenizer
      if name == "simple":
          return SimpleTokenizer
  
      raise RuntimeError("Invalid tokenizer: %s" % name)
  
label_desc: Use image node_id 2 for calling a global function with example usage: get_class(name) and returns: SpacyTokenizer, RegexpTokenizer, SimpleTokenizer