code: def check_forward(self, x_data):
      distributions.utils._modified_xlogx(x_data)
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import distributions
  from chainer import gradient_check
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 2 for calling the TestModifiedXLogX obj's underlying member method code with example usage: obj.check_forward(x_data) without return types