code: def get_shapes(self):
      return self.shapes
  
file_path: PaddleOCR/PPOCRLabel/libs/create_ml_io.py
imports: import json
  from pathlib import Path
  from libs.constants import DEFAULT_ENCODING
  import os
label_desc: Use image node_id 4 for calling the CreateMLReader obj's underlying member method code with example usage: obj.get_shapes() and returns: self