code: def __init__(self, config):
      super().__init__(config)
      self.mlm_head = MLM(config)
  
file_path: mmf/mmf/models/transformers/heads/mlm.py
imports: import warnings
  from dataclasses import dataclass
  from typing import Dict, List, Optional
  import torch
  from mmf.common.registry import registry
  from mmf.models.transformers.base import BaseTransformerHead
label_desc: Use image node_id 1 to create a new MLMForMultiHeads object from inherited base classes: BaseTransformerHead with example: obj = MLMForMultiHeads(config)