code: def declare_backward_dependency(self, out_grad, in_data, out_data):
      return []
  
imports: from __future__ import print_function
  import sys
  import mxnet
  import numpy
  import datetime
  from distutils.util import strtobool
  from ..config import config, generate_config
  from ..processing.generate_anchor import generate_anchors, anchors_plane
  from ..processing.bbox_transform import bbox_overlaps, bbox_transform, landmark_transform
label_desc: Use image node_id 6 for calling the CascadeRefineProp obj's underlying member method code with example usage: obj.declare_backward_dependency(out_grad, in_data, out_data) and returns: list