code: def check_type_forward(self, in_types):
      type_check._argname(in_types, ("gy",))
  
      gy_type = in_types[0]
      type_check.expect(
          gy_type.dtype == numpy.float32, gy_type.ndim == 4
      )
  
imports: from __future__ import division
  import numpy
  from chainer import backend
  from chainer.backends import cuda
  from chainer import function_node
  from chainer.utils import type_check
label_desc: Use image node_id 2 for calling the ResizeImagesGrad obj's underlying member method code with example usage: obj.check_type_forward(in_types) without return types