code: def __init__(self, datasets):
      # assertions:
      assert isinstance(datasets, list)
      assert all(
          len(dataset) == len(datasets[0]) for dataset in datasets
      )
  
      # create object:
      super(MergeDataset, self).__init__()
      self.datasets = datasets
  
label_desc: Use image node_id 1 to create a new MergeDataset object  with example: obj = MergeDataset(datasets)