[fixes #2682] Fix NPE, always add Javadoc return statement

test/transform/resource/after-delombok/NullLibrary2.java

@@ -35,6 +35,9 @@ public class NullLibrary2 {
 	public NullLibrary2(final String foo) {
 		this.foo = foo;
 	}
+	/**
+	 * @return a clone of this object, except with this updated property (returns {@code this} if an identical value is passed).
+	 */
 	@org.springframework.lang.NonNull
 	@java.lang.SuppressWarnings("all")
 	public NullLibrary2 withFoo(final String foo) {