code: def __init__(self, eps, mean, inv_std, dummy_gamma):
      self.eps = eps
      self.mean = mean
      self.inv_std = inv_std
      self.dummy_gamma = dummy_gamma
  
imports: import numpy
  import chainer
  from chainer import backend
  from chainer.backends import cuda
  from chainer import configuration
  from chainer import function_node
  from chainer.utils import type_check
label_desc: Use image node_id 1 to create a new _XHat object from inherited base classes: function_node with example: obj = _XHat(eps, mean, inv_std, dummy_gamma)