code: def sample_for_test(self):
      smp = numpy.random.normal(
          size=self.sample_shape + self.shape
      ).astype(numpy.float32)
      return smp
  
file_path: chainer/tests/chainer_tests/distributions_tests/test_gumbel.py
imports: import numpy
  from chainer import distributions
  from chainer import testing
  from chainer import utils
label_desc: Use image node_id 2 for calling the TestGumbel obj's underlying member method code with example usage: obj.sample_for_test() and returns: smp