code: def test_single_encoder_b(self):
      model = tests.mocks.models_keras.KerasSingle(type="len1")
      model.estimator.build()
  
imports: import unittest
  import tests.mocks.models_keras
  import scipy.stats
  import numpy
label_desc: Use image node_id 2 for calling the TestKerasSingle obj's underlying member method code with example usage: obj.test_single_encoder_b() without return types