code: def forward(self, x):
      x = self.conv(x)
      x = self.bn(x)
      return x
  
imports: from torch import nn
  from torch.nn import functional
  import torch
  from torchvision import models
  from torchvision.models import resnet34, resnet101, resnet50, resnet152
  import torchvision
label_desc: Use image node_id 2 for calling the ConvBn2d obj's underlying member method code with example usage: obj.forward(x) and returns: x