code: def testEpanechnikov(self):
      k = parabolic.Parabolic()
      self.assertAllClose(0.75, k.matrix([[0.0]], [[0.0]])[0, 0])
      self.assertAllEqual(
          [0.0, 0.0], k.matrix([[0.0]], [[1.0], [-1.0]])[0]
      )
      self.assertAllEqual(
          [0.0, 0.0], k.matrix([[0.0]], [[1.1], [-1.1]])[0]
      )
  
file_path: probability/tensorflow_probability/python/math/psd_kernels/parabolic_test.py
imports: from absl.testing import parameterized
  import numpy
  import tensorflow.compat.v2
  from tensorflow_probability.python.internal import test_util
  from tensorflow_probability.python.math.psd_kernels import parabolic
label_desc: Use image node_id 3 for calling the ParabolicTest obj's underlying member method code with example usage: obj.testEpanechnikov() without return types