code: def default(method):
      """Decorates a method to detect overrides in subclasses."""
      method._is_default = True
      return method
  
file_path: keras/keras/utils/python_utils.py
imports: import binascii
  import codecs
  import marshal
  import os
  import types
label_desc: Use image node_id 1 for calling a global function with example usage: default(method) and returns: method