code: def combine_graph_data(graphs: Iterable[ArrayDict]) -> ArrayDict:
      """Flattens graph dictionaries into a common dictionary with the same keys."""
      graphs_dict = collections.defaultdict(list)
      for graph in graphs:
          for column, column_vals in graph.items():
              for val in column_vals:
                  graphs_dict[column].append(val)
      return graphs_dict
  
file_path: datasets/tensorflow_datasets/datasets/ogbg_molpcba/dummy_data_generation.py
imports: import collections
  import itertools
  import random
  from typing import Dict, Iterable, List, Text
  from absl import app
  from absl import flags
  from etils import epath
  import numpy
  from tensorflow_datasets.core import utils
  from tensorflow_datasets.core.utils import resource_utils
  from tensorflow_datasets.core.utils.lazy_imports_utils import pandas
label_desc: Use image node_id 6 for calling a global function with example usage: combine_graph_data(graphs) and returns: graphs_dict