code: def testScheduledSampleProbStart(self):
      ground_truth_x, _, ss_out = self._run_scheduled_sample_func(
          common_video.scheduled_sample_prob, 1.0, 10
      )
      self.assertAllEqual(ground_truth_x, ss_out)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from absl.testing import parameterized
  import numpy
  from tensor2tensor.layers import common_video
  from tensor2tensor.utils import test_utils
  import tensorflow.compat.v1
label_desc: Use image node_id 2 for calling the CommonVideoTest obj's underlying member method code with example usage: obj.testScheduledSampleProbStart() without return types