code: def __call__(self, results):
      for i in range(self.iter_num):
          results = self.random_crop_flip(results)
  
      return results
  
imports: import numpy
  from PIL import Image, ImageDraw
  import cv2
  from shapely.geometry import Polygon
  import math
  from ppocr.utils.poly_nms import poly_intersection
label_desc: Use image node_id 2 for calling the RandomCropFlip obj's underlying member method code with example usage: obj.__call__(results) and returns: results