code: def config_path(cls):
      return "configs/models/m4c_captioner/defaults.yaml"
  
imports: from mmf.common.registry import registry
  from mmf.models.m4c import M4C
label_desc: Use image node_id 2 for calling the M4CCaptioner obj's underlying member method code with example usage: obj.config_path(cls) and returns: str