code: def forward(self, query, key, value):
      return self.compute_attention(query, key, value)
  
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 2 for calling the Attention obj's underlying member method code with example usage: obj.forward(query, key, value) and returns: self