code: def dict_forward(
      self,
      x_dict: Dict[NodeType, Tensor],
      edge_index_dict: Dict[EdgeType, Tensor],
      **kwargs,
  ) -> Dict[NodeType, Tensor]:
      return self.hetero_module(x_dict, edge_index_dict, **kwargs)
  
imports: import copy
  import warnings
  from typing import Dict, List, Optional, Union
  import torch
  import torch.nn.functional
  from torch import Tensor
  import torch_geometric
  from torch_geometric import is_compiling
  from torch_geometric.typing import EdgeType, NodeType, OptTensor
  from torch_geometric.utils import cumsum, scatter
label_desc: Use image node_id 3 for calling the ToHeteroMessagePassing obj's underlying member method code with example usage: obj.dict_forward(x_dict, edge_index_dict) and returns: self