code: def test_paraboloid_4th_order(self):
      self._check_algorithm(
          func=lambda x: tf.reduce_sum(x**4),
          start_point=[1, 2, 3, 4, 5],
          expected_argmin=[0, 0, 0, 0, 0],
          gtol=1e-10,
      )
  
imports: import numpy
  import tensorflow.compat.v2
  import tf_quant_finance
  from tensorflow.python.framework import test_util
label_desc: Use image node_id 4 for calling the ConjugateGradientTest obj's underlying member method code with example usage: obj.test_paraboloid_4th_order() without return types