docstr: Returns a unique id for this driver
docstr_tok: ["Returns","a","unique","id","for","this","driver"]
code: def id(self):
      """Returns a unique id for this driver"""
  
imports: from abc import abstractmethod, ABCMeta
  from streamalert.shared.logger import get_logger
label_desc: Use image node_id 3 for calling the PersistenceDriver obj's underlying member method code with example usage: obj.id() without return types