class_docstr: Tests correctness of Sigmoid with `low` and `high` parameters set.
class_docstr_tok: ["Tests","correctness","of","Sigmoid","with","`","low","`","and","`","high","`","parameters","set","."]
code: def testScalarCongruency(self):
      low = -2.0
      high = 5.0
      bijector = sigmoid.Sigmoid(low=low, high=high, validate_args=True)
      bijector_test_util.assert_scalar_congruency(
          bijector,
          lower_x=-5.0,
          upper_x=3.5,
          eval_func=self.evaluate,
          rtol=0.05,
      )
  
imports: from absl.testing import parameterized
  import numpy
  from scipy import special
  import tensorflow.compat.v2
  from tensorflow_probability.python.bijectors import bijector_test_util
  from tensorflow_probability.python.bijectors import chain
  from tensorflow_probability.python.bijectors import scale
  from tensorflow_probability.python.bijectors import shift
  from tensorflow_probability.python.bijectors import sigmoid
  from tensorflow_probability.python.internal import test_util
label_desc: Use image node_id 3 for calling the ShiftedScaledSigmoidBijectorTest obj's underlying member method code with example usage: obj.testScalarCongruency() without return types