/**
* Set an {@link org.springframework.kafka.listener.KafkaListenerErrorHandler} bean
* name to invoke if the listener method throws an exception. If a SpEL expression is
* provided ({@code #{...}}), the expression can either evaluate to a
* {@link org.springframework.kafka.listener.KafkaListenerErrorHandler} instance or a
* bean name.
* @return the error handler.
* @since 1.3
*/
String errorHandler() default "";