def add_exception_handler(self, exception_handler):
        # type: (AbstractExceptionHandler) -> None
        """Register input to the exception handlers list.

        :param exception_handler: Exception Handler instance to be
            registered.
        :type exception_handler: AbstractExceptionHandler
        :return: None
        """
        if exception_handler is None:
            raise RuntimeConfigException(
                "Valid Exception Handler instance to be provided")

        if not isinstance(exception_handler, AbstractExceptionHandler):
            raise RuntimeConfigException(
                "Input should be an ExceptionHandler instance")

        self.exception_handlers.append(exception_handler)
Register input to the exception handlers list.

        :param exception_handler: Exception Handler instance to be
            registered.
        :type exception_handler: AbstractExceptionHandler
        :return: None