code: def testAnisotropicDiffusion_ListOfTensors(self):
      def pack_second_order_coeff_fn(u_yy, u_xy, u_xx):
          return [
              tf.constant([u_yy, u_xy], dtype=tf.float32),
              tf.constant([u_xy, u_xx], dtype=tf.float32),
          ]
  
      self._testDiffusionInDiagonalDirection(pack_second_order_coeff_fn)
  
imports: from absl.testing import parameterized
  import numpy
  import tensorflow.compat.v2
  import tf_quant_finance
  from tensorflow.python.framework import test_util
label_desc: Use image node_id 6 for calling the MultidimParabolicEquationStepperTest obj's underlying member method code with example usage: obj.testAnisotropicDiffusion_ListOfTensors() and returns: list