code: def forward(self, *xs):
      rcu_xs = []
  
      for i, x in enumerate(xs):
          rcu_xs.append(self.__getattr__("rcu{}".format(i))(x))
  
      if self.mrf is not None:
          out = self.mrf(*rcu_xs)
      else:
          out = rcu_xs[0]
  
      out = self.crp(out)
      return self.output_conv(out)
  
imports: import torch.nn
label_desc: Use image node_id 2 for calling the BaseRefineNetBlock obj's underlying member method code with example usage: obj.forward() and returns: self