code: def forward(self, x):
      y = self.conv(x)
      y = self.bn(y)
      return y * 2 + 10
  
imports: from contextlib import contextmanager
  import ctypes
  import numpy
  import pytest
  import mxnet
  from mxnet import amp
  from mxnet.base import check_call, _LIB
  from mxnet.gluon import nn
  from mxnet.test_utils import assert_allclose
label_desc: Use image node_id 2 for calling the ConvBN obj's underlying member method code with example usage: obj.forward(x) and returns: unknown