code: def forward_gpu(self, inputs):
      (gy,) = inputs
      gy = _get_kern()(self.cond, gy, self.slope)
      return (gy,)
  
imports: from chainer.backends import cuda
  from chainer.backends import intel64
  from chainer import function_node
  from chainer.utils import type_check
label_desc: Use image node_id 4 for calling the _LeakyReLUGrad obj's underlying member method code with example usage: obj.forward_gpu(inputs) and returns: gy