code: def testBijector(self):
      def f(x):
          return tfb.GumbelCDF(loc=np.arange(3.0)).forward(x)
  
      f(0.0)
      f(np.array([1, 2, 3.0]))
  
imports: import numpy
  from tensorflow_probability.substrates import numpy
  from absl.testing import absltest
label_desc: Use image node_id 1 for calling the NumpyIntegrationTest obj's underlying member method code with example usage: obj.testBijector() and returns: tfb