code: def _check_backward_binary(fprop):
      chainerx.check_backward(
          fprop,
          (
              chainerx.array(
                  [1, -2, 1], chainerx.float32
              ).require_grad(),
              chainerx.array(
                  [0, 1, 2], chainerx.float32
              ).require_grad(),
          ),
          (chainerx.array([1, -2, 3], chainerx.float32),),
          (
              chainerx.full((3,), 1e-3, chainerx.float32),
              chainerx.full((3,), 1e-3, chainerx.float32),
          ),
      )
  
file_path: chainer/tests/chainerx_tests/unit_tests/test_check_backward.py
imports: import pytest
  import chainerx
label_desc: Use image node_id 4 for calling a global function with example usage: _check_backward_binary(fprop) without return types