code: def _get_valid_boxes_and_pos_chips(self, gt_bbox, chips):
      valid_ratio_range = self._cur_valid_ratio_range
      im_size = self._cur_im_size
      scale = self._cur_scale
      #   Nx4            N
      valid_boxes, valid_boxes_idx = self._validate_boxes(
          valid_ratio_range, im_size, gt_bbox, scale
      )
      # dict: chipid->[box_id, ...]
      pos_chip2boxes_idx = self._find_pos_chips(
          chips, valid_boxes, valid_boxes_idx
      )
      return pos_chip2boxes_idx
  
imports: import copy
  import math
  import random
  import numpy
  from copy import deepcopy
  from typing import List, Tuple
  from collections import defaultdict
  from .chip_box_utils import nms, transform_chip_boxes2image_boxes
  from .chip_box_utils import find_chips_to_cover_overlaped_boxes
  from .chip_box_utils import transform_chip_box
  from .chip_box_utils import intersection_over_box
label_desc: Use image node_id 11 for calling the AnnoCropper obj's underlying member method code with example usage: obj._get_valid_boxes_and_pos_chips(gt_bbox, chips) and returns: pos_chip2boxes_idx