Incorrect 'channel' attribute in an endpoint method annotation

@Component public class MyComponent {} @Gateway(requestChannel = "requestChannel", replyChannel = "replyChannel") public void gateway() {...} @Gateway( requestChannel ="simpleBean", // Bean must be one of these types: org.springframework.integration.MessageChannel,org.springframework.messaging.MessageChannel replyChannel = "unknownChannel") // Cannot find channel public void errors() {...} @Bean public MyBean simpleBean() {...} }