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