code: def __init__(self):
      super().__init__()
      self.dataset_name = "masked_coco"
      self.set_dataset_class(MaskedCOCODataset)
  
imports: from mmf.common.registry import registry
  from mmf.datasets.builders.coco.builder import COCOBuilder
  from .masked_dataset import MaskedCOCODataset
label_desc: Use image node_id 1 to create a new MaskedCOCOBuilder object from inherited base classes: COCOBuilder with example: obj = MaskedCOCOBuilder()