code: def config_path(cls):
      return "configs/always_one.yaml"
  
file_path: mmf/tests/data/user_dir/datasets/always_one.py
imports: from mmf.common.registry import registry
  from mmf.datasets.base_dataset_builder import BaseDatasetBuilder
  from tests.test_utils import NumbersDataset
label_desc: Use image node_id 3 for calling the AlwaysOneBuilder obj's underlying member method code with example usage: obj.config_path(cls) and returns: str