code: def __init__(self, *args, **kwargs):
      kwargs.setdefault("aggr", "add")
      super(GCN2Conv, self).__init__(*args, **kwargs)
  
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 1 to create a new GCN2Conv object from inherited base classes: GCN2Conv with example: obj = GCN2Conv()