code: def test_td_k_bias_decreases_with_k(self, k1, k2):
      (bias1, _) = estimate_advantage_bias_and_variance(
          advantages.td_k, margin=k1
      )
      (bias2, _) = estimate_advantage_bias_and_variance(
          advantages.td_k, margin=k2
      )
      self.assertGreater(bias1, bias2)
  
file_path: trax/trax/rl/advantages_test.py
imports: import functools
  from absl.testing import absltest
  from absl.testing import parameterized
  import numpy
  from trax.rl import advantages
label_desc: Use image node_id 4 for calling the AdvantagesTest obj's underlying member method code with example usage: obj.test_td_k_bias_decreases_with_k(k1, k2) without return types