code: def test_himmelblau_v2(self):
      self._check_algorithm(
          func=_himmelblau,
          start_point=[-2, 3],
          expected_argmin=[-2.805118, 3.131312],
          gtol=1e-8,
      )
  
imports: import numpy
  import tensorflow.compat.v2
  import tf_quant_finance
  from tensorflow.python.framework import test_util
label_desc: Use image node_id 11 for calling the ConjugateGradientTest obj's underlying member method code with example usage: obj.test_himmelblau_v2() without return types