code: def hybrid_forward(self, F, x):
      out = self.expand(x) if self.first_conv else x
      out = self.conv1(out)
      if self.use_se:
          out = self.se(out)
      out = self.conv2(out)
      if self.use_short_cut_conv:
          return x + out
      else:
          return out
  
imports: from __future__ import division
  import numpy
  from mxnet.gluon import nn
  from mxnet.gluon.nn import BatchNorm
  from mxnet.gluon.block import HybridBlock
  from mxnet.context import cpu
  from ..nn import ReLU6, HardSigmoid, HardSwish
label_desc: Use image node_id 2 for calling the _ResUnit obj's underlying member method code with example usage: obj.hybrid_forward(F, x) and returns: unknown, out