class_docstr: Element-wise absolute error function.
code: def backward(self, indexes, grad_outputs):
      (gy,) = grad_outputs
      gx = gy * backend.get_array_module(gy).sign(self.diff)
      return gx, -gx
  
file_path: chainer/chainer/functions/loss/absolute_error.py
imports: from chainer import backend
  from chainer import function_node
  from chainer import utils
  from chainer.utils import type_check
  import chainerx
label_desc: Use image node_id 4 for calling the AbsoluteError obj's underlying member method code with example usage: obj.backward(indexes, grad_outputs) and returns: gx,  unknown