text: # encoding: utf-8
  import hashlib
  
  
  def get_identifier_method(key):
      """
      Custom get_identifier method used for testing the
      setting HAYSTACK_IDENTIFIER_MODULE
      """
  
      if hasattr(key, "get_custom_haystack_id"):
          return key.get_custom_haystack_id()
      else:
          key_bytes = key.encode("utf-8")
          return hashlib.md5(key_bytes).hexdigest()
  