class_docstr: Lists versions in the dataset collection, along with their datasets.
code: def get_key(self, loader: tfds.core.DatasetCollectionLoader):
      release_key = tuple(
          (k, v)
          for k, v in loader.collection.info.release_notes.items()
      )
      return (tuple(loader.collection.all_versions), release_key)
  
imports: import abc
  import textwrap
  from typing import List
  import tensorflow_datasets
  from tensorflow_datasets.scripts.documentation import dataset_markdown_builder
  from tensorflow_datasets.scripts.documentation import doc_utils
label_desc: Use image node_id 2 for calling the CollectionVersionSection obj's underlying member method code with example usage: obj.get_key(loader) and returns: tuple,  release_key