code: def test_expectations_4d(self):
      self.verify_expectations(4)
  
imports: import numpy
  import tensorflow.compat.v1
  import tensorflow.compat.v2
  from tensorflow_probability.python.internal import dtype_util
  from tensorflow_probability.python.internal import test_util
  from tensorflow_probability.python.random import random_ops
  from tensorflow_probability.python.stats import sample_stats
label_desc: Use image node_id 5 for calling the _RandomSphericalUniform obj's underlying member method code with example usage: obj.test_expectations_4d() without return types