code: def backward(self, indexes, grad_outputs):
      return Repeat(self.repeats, self.axis).apply(grad_outputs)
  
file_path: chainer/chainer/functions/array/repeat.py
imports: import six
  from chainer import backend
  from chainer import function_node
  from chainer import utils
  from chainer.utils import type_check
label_desc: Use image node_id 3 for calling the RepeatGrad obj's underlying member method code with example usage: obj.backward(indexes, grad_outputs) and returns: Repeat