code: def testDoublesidedMaxwellStandardDeviation(self):
      # sigma will be broadcast to [7, 7, 7]
      loc = [1.0, 2.0, 3.0]
      sigma = [7.0]
  
      dsmaxwell = doublesided_maxwell.DoublesidedMaxwell(
          loc=loc, scale=sigma, validate_args=True
      )
  
      self.assertAllEqual((3,), dsmaxwell.stddev().shape)
      std = np.sqrt(147)
      self.assertAllClose(
          [std, std, std], self.evaluate(dsmaxwell.stddev())
      )
  
file_path: probability/tensorflow_probability/python/distributions/doublesided_maxwell_test.py
imports: from absl.testing import parameterized
  import numpy
  from scipy import stats
  import tensorflow.compat.v2
  from tensorflow_probability.python.distributions import doublesided_maxwell
  from tensorflow_probability.python.internal import test_util
label_desc: Use image node_id 10 for calling the DoublesidedMaxwellTest obj's underlying member method code with example usage: obj.testDoublesidedMaxwellStandardDeviation() without return types