code: def get_cache_key(
      self, dataset: CacheableDataset, config: dict
  ) -> str:
      return calculate_checksum(dataset, config)
  
imports: import logging
  import os
  from typing import Optional
  from ludwig.constants import CHECKSUM, META, TEST, TRAINING, VALIDATION
  from ludwig.data.cache.types import alphanum, CacheableDataset
  from ludwig.data.cache.util import calculate_checksum
  from ludwig.data.dataset.base import DatasetManager
  from ludwig.utils import data_utils
  from ludwig.utils.fs_utils import delete, path_exists
label_desc: Use image node_id 3 for calling the CacheManager obj's underlying member method code with example usage: obj.get_cache_key(dataset, config) and returns: calculate_checksum