code: def hybrid_forward(self, F, x, x_prev):
      x_left = self.conv_prev_1x1(x_prev)
      x_right = self.conv_1x1(x)
  
      x_comb_iter_0_left = self.comb_iter_0_left(x_right)
      x_comb_iter_0_right = self.comb_iter_0_right(x_left)
      x_comb_iter_0 = x_comb_iter_0_left + x_comb_iter_0_right
  
      x_comb_iter_1_left = self.comb_iter_1_left(x_right)
      x_comb_iter_1_right = self.comb_iter_1_right(x_left)
      x_comb_iter_1 = x_comb_iter_1_left + x_comb_iter_1_right
  
      x_comb_iter_2_left = self.comb_iter_2_left(x_right)
      x_comb_iter_2_right = self.comb_iter_2_right(x_left)
      x_comb_iter_2 = x_comb_iter_2_left + x_comb_iter_2_right
  
      x_comb_iter_3_right = self.comb_iter_3_right(x_comb_iter_0)
      x_comb_iter_3 = x_comb_iter_3_right + x_comb_iter_1
  
      x_comb_iter_4_left = self.comb_iter_4_left(x_comb_iter_0)
      x_comb_iter_4_right = self.comb_iter_4_right(x_right)
      x_comb_iter_4 = x_comb_iter_4_left + x_comb_iter_4_right
  
      x_out = F.concat(
          x_comb_iter_1,
          x_comb_iter_2,
          x_comb_iter_3,
          x_comb_iter_4,
          dim=1,
      )
  
      return x_out, x
  
imports: from __future__ import division
  import os
  from mxnet import cpu
  from mxnet.gluon import nn
  from mxnet.gluon.nn import BatchNorm
  from mxnet.gluon.block import HybridBlock
label_desc: Use image node_id 2 for calling the ReductionCell0 obj's underlying member method code with example usage: obj.hybrid_forward(F, x, x_prev) and returns: x_out,  x