code: def __init__(self):
      super().__init__()
      self.dataset_name = "masked_visual_genome"
      self.dataset_class = MaskedVisualGenomeDataset
  
imports: from mmf.common.registry import registry
  from mmf.datasets.builders.visual_genome.builder import VisualGenomeBuilder
  from mmf.datasets.builders.visual_genome.masked_dataset import MaskedVisualGenomeDataset
label_desc: Use image node_id 1 to create a new MaskedVisualGenomeBuilder object from inherited base classes: VisualGenomeBuilder with example: obj = MaskedVisualGenomeBuilder()