code: def forward(self, x):
      x = self.conv(x)
      if self.bn is not None:
          x = self.bn(x)
      if self.relu is not None:
          x = self.relu(x)
      return x
  
imports: import torch
  import torch.nn
  import torch.nn.functional
label_desc: Use image node_id 2 for calling the ConvBnRelu2d obj's underlying member method code with example usage: obj.forward(x) and returns: x