code: def hybrid_forward(self, F, x):
      out = self.conv1(x)
      out = self.conv2(out)
  
      return out
  
imports: import numpy
  from math import sqrt
  import mxnet
  import mxnet.ndarray
  import mxnet.gluon.nn
  from numpy import prod
label_desc: Use image node_id 2 for calling the ConvBlock obj's underlying member method code with example usage: obj.hybrid_forward(F, x) and returns: out