class_docstr: A base dummy tokenizer to derive from.
class_docstr_tok: ["A","base","dummy","tokenizer","to","derive","from","."]
docstr: Tokenizes an input line with the tokenizer.
  :param line: a segment to tokenize
  :return: the tokenized line
docstr_tok: ["Tokenizes","an","input","line","with","the","tokenizer",".",":","param","line",":","a","segment","to","tokenize",":","return",":","the","tokenized","line"]
code: def __call__(self, line):
      """
      Tokenizes an input line with the tokenizer.
      :param line: a segment to tokenize
      :return: the tokenized line
      """
      return line
  
file_path: evaluate/metrics/bleu/tokenizer_13a.py
imports: import re
  from functools import lru_cache
label_desc: Use image node_id 2 for calling the BaseTokenizer obj's underlying member method code with example usage: obj.__call__(line) and returns: line