docstr: Sets up default parameters.
docstr_tok: ["Sets","up","default","parameters","."]
code: def setUp(self):
      """Sets up default parameters."""
      super(MeshSamplerTest, self).setUp()
      self._test_sigma_compare_tolerance = 4.0
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing import parameterized
  import numpy
  from six.moves import range
  import tensorflow
  from tensorflow_graphics.geometry.representation.mesh import sampler
  from tensorflow_graphics.geometry.representation.mesh.tests import mesh_test_utils
  from tensorflow_graphics.util import test_case
label_desc: Use image node_id 1 for calling the MeshSamplerTest obj's underlying member method code with example usage: obj.setUp() without return types