@FunctionalInterface
public MyInterface {
    default boolean authorize(String value) {
        return true;
    }
}

@FunctionalInterface
interface MyInterface {

    boolean authorize(int val);

    default boolean authorize(String value) {
        return true;
    }
}

@FunctionalInterface
interface MyInterface {

    default boolean authorize(String value) {
        return true;
    }

    boolean equals(Object o);
}

@FunctionalInterface
public interface MyInterface {
    static MyInterface DEFAULT = s->true;
    boolean authorize(String value);
}