code: def reg_modules(self):
      return ModuleList(list(self.convs) + list(self.bns))
  
imports: from typing import Optional
  from torch_geometric.typing import Adj, OptTensor
  import torch.nn.functional
  from torch.nn import ModuleList, Linear, BatchNorm1d
  from torch_geometric.nn import GCN2Conv
  import torch
  from torch import Tensor
  from torch_sparse import SparseTensor
  from ..models import ScalableGNN
label_desc: Use image node_id 2 for calling the GCN2 obj's underlying member method code with example usage: obj.reg_modules() and returns: ModuleList