text: from typing import Any
  
  
  class BaseHandler(object):
  
      def get(self, option: 'Option') -> Any:
          raise NotImplementedError()
  
      def set(self, option: 'Option', value: Any) -> None:
          raise NotImplementedError()
  
      def delete(self, option: 'Option') -> Any:
          raise NotImplementedError()
  