code: def accept(self):
      return "NG"
  
file_path: nnabla/python/src/nnabla/utils/image_utils/backend_events/image_utils_backend.py
imports: from collections import OrderedDict
label_desc: Use image node_id 2 for calling the ImageUtilsBackend obj's underlying member method code with example usage: obj.accept() and returns: str