code: def get_train_num_normal(
      pattern_pathname: str,
      test_fold: int,
  ) -> int:
      return (
          FOLD_BREAKDOWN_METADATA[pattern_pathname]["all_folds"][
              "num_normal"
          ]
          - FOLD_BREAKDOWN_METADATA[pattern_pathname][test_fold][
              "num_normal"
          ]
      )
  
imports: import itertools
  import ml_collections
label_desc: Use image node_id 2 for calling a global function with example usage: get_train_num_normal(pattern_pathname, test_fold) and returns: unknown