code: def test_root_near_zero(self):
      root = tf.exp(-13.0)
      low, high = self.evaluate(
          root_search.bracket_root(lambda x: (x - root))
      )
      self.assertLess(low, np.exp(-13.0))
      self.assertGreater(high, np.exp(-13))
      self.assertAllClose(low, root, atol=1e-4)
      self.assertAllClose(high, root, atol=1e-4)
  
imports: import numpy
  import scipy.optimize
  import tensorflow.compat.v1
  import tensorflow.compat.v2
  from tensorflow_probability.python.internal import samplers
  from tensorflow_probability.python.internal import special_math
  from tensorflow_probability.python.internal import test_util
  from tensorflow_probability.python.math import root_search
label_desc: Use image node_id 3 for calling the BracketRootTest obj's underlying member method code with example usage: obj.test_root_near_zero() without return types