code: def testSqrt(self):
      self._testUnaryOp(math_ops.sqrt, np.sqrt, "sqrt")
  
imports: import itertools
  from absl.testing import parameterized
  import numpy
  from six.moves import range
  import tensorflow.compat.v2
  from trax.tf_numpy.numpy_impl import array_ops
  from trax.tf_numpy.numpy_impl import arrays
  from trax.tf_numpy.numpy_impl import math_ops
label_desc: Use image node_id 12 for calling the MathTest obj's underlying member method code with example usage: obj.testSqrt() without return types