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