private static void print(final String message, final Object... args) {
        //CHECKSTYLE:OFF
        System.out.print("\uD83C\uDFC1 ");
        System.out.printf(message, args);
        System.out.println();
        //CHECKSTYLE:ON
    }
This is {@link CheckAsyncAnnotationInInterface}.
Fail build if Async annotation is not in an interface.
This ensures interface exists for Async classes so Spring can use JDK proxy instead of cglib proxy.
@author Hal Deadman
@since 6.5.0
ci/checks/CheckAsyncAnnotationInInterface.java