code: def config_path(cls):
      return "configs/datasets/sbu_captions/masked.yaml"
  
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 2 for calling the MaskedSBUBuilder obj's underlying member method code with example usage: obj.config_path(cls) and returns: str