code: def test_negative_root(self):
      root = -17.314
      low, high = self.evaluate(
          root_search.bracket_root(lambda x: (x - root))
      )
      self.assertLess(low, root)
      self.assertGreater(high, root)
  
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 2 for calling the BracketRootTest obj's underlying member method code with example usage: obj.test_negative_root() without return types