class_docstr: Helper class to wrap a callable into a class with a `tokenize` method as used by rouge-score.
code: def tokenize(self, text):
      return self.tokenizer_func(text)
  
file_path: evaluate/metrics/rouge/rouge.py
imports: import absl
  import datasets
  import nltk
  import numpy
  import six
  from rouge_score import rouge_scorer, scoring
  import evaluate
label_desc: Use image node_id 2 for calling the Tokenizer obj's underlying member method code with example usage: obj.tokenize(text) and returns: self