code: def train(self):
      for model in self.model_list:
          model.train()
      torch.set_grad_enabled(True)
  
imports: from collections import OrderedDict
  import os
  import numpy
  import torch
  from torch import nn
  from gluoncv.torch.utils.coot_utils import truncated_normal_fill
label_desc: Use image node_id 6 for calling the MultiModalTransformer obj's underlying member method code with example usage: obj.train() without return types