code: def __repr__(self) -> str:  # pragma: no cover
      return (
          f"{self.__class__.__name__}({self.in_channels}, "
          f"{self.out_channels}, groups={self.groups})"
      )
  
imports: import math
  from typing import Optional
  import torch
  import torch.nn.functional
  from torch import Tensor
  from torch.nn import Parameter
  from torch_geometric.nn.conv import MessagePassing
  from torch_geometric.nn.conv.gcn_conv import gcn_norm
  from torch_geometric.nn.inits import kaiming_uniform, uniform
  from torch_geometric.typing import Adj, OptPairTensor, OptTensor, SparseTensor
label_desc: Use image node_id 4 for calling the Linear obj's underlying member method code with example usage: obj.__repr__() and returns: self, str, self, str, self, str, self, str