code: def __init__(self, config):
      super().__init__(config)
      self.remove_unk_in_pred = self.config.remove_unk_in_pred
  
imports: from mmf.common.registry import registry
  from mmf.models.m4c import M4C
label_desc: Use image node_id 1 to create a new M4CCaptioner object from inherited base classes: M4C with example: obj = M4CCaptioner(config)