code: def forward(self, x):
      residual = x
  
      out = self.conv1(x)
      out = self.bn1(out)
      out = self.relu(out)
  
      out = self.conv2_middle(out)
      out = self.bn2_middle(out)
      out = self.relu(out)
  
      out = self.conv2(out)
      out = self.bn2(out)
      out = self.relu(out)
  
      out = self.conv3(out)
      out = self.bn3(out)
  
      if self.down_sample is not None:
          residual = self.down_sample(x)
  
      out += residual
      out = self.relu(out)
  
      return out
  
file_path: gluon-cv/gluoncv/torch/model_zoo/action_recognition/r2plus1dv2.py
imports: import torch
  import torch.nn
label_desc: Use image node_id 2 for calling the Bottleneck_R2plus1Dv2 obj's underlying member method code with example usage: obj.forward(x) and returns: out