code: def _initialize_weights(self):
      init.orthogonal_(self.conv1.weight, init.calculate_gain("relu"))
      init.orthogonal_(self.conv2.weight, init.calculate_gain("relu"))
      init.orthogonal_(self.conv3.weight, init.calculate_gain("relu"))
      init.orthogonal_(self.conv4.weight)
  
imports: import torch.nn
  import torch.nn.init
label_desc: Use image node_id 3 for calling the Net obj's underlying member method code with example usage: obj._initialize_weights() without return types