code: def __init__(self, dataset_name, dataset_type):
      self._dataset_name = dataset_name
      self._dataset_type = dataset_type
  
imports: from mmf.common.sample import convert_batch_to_sample_list
label_desc: Use image node_id 1 to create a new BatchCollator object  with example: obj = BatchCollator(dataset_name, dataset_type)