class_docstr: Ignores all input features and returns a single int feature with all 0 values.
  Useful for testing purposes or to avoid crashes if no features were given.
code: def get_default_infer_features_in_args() -> dict:
      return dict(valid_raw_types=[])
  
file_path: autogluon/features/src/autogluon/features/generators/dummy.py
imports: import logging
  from pandas import DataFrame
  from autogluon.common.features.feature_metadata import FeatureMetadata
  from .abstract import AbstractFeatureGenerator
label_desc: Use image node_id 4 for calling the DummyFeatureGenerator obj's underlying member method code with example usage: obj.get_default_infer_features_in_args() and returns: dict