package javax.annotation; import java.lang.annotation.Documented; import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target; import javax.annotation.meta.When; @Documented @Target( { ElementType.METHOD, ElementType.CONSTRUCTOR, ElementType.TYPE, ElementType.PACKAGE }) @Retention(RetentionPolicy.RUNTIME) public @interface CheckReturnValue { When when() default When.ALWAYS; }