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# Conclude
The essential part is to overwrite a new async method.
Another way would be to generate a new method with a different name, for example, `sayHiAsync`, then we can get rid of `AsyncSignal`. But there's an obvious flaw of this approach, that is, all method level configurators and routers defined to `sayHi` will not take effect anymore.
+
+```java
+public interface GreetingsService {
+ String sayHi(String name);
+
+ // Any name is ok
+ default CompletableFuture<String> sayHiAsync(String name) {
+ return CompletableFuture.completedFuture(sayHi(name));
+ }
+}
+```
