class Parent {
    @Option(name = "-n", aliases = "--number", usage = "set number")
    private int num;

    @Option(name = "-o", aliases = "--output", usage = "set output file")
    protected String output; // this option may be used in subclasses
}

class Child extends Parent {
    // want to override the option '-n' for another usage
    @Option(name = "-n", aliases = "--next", usage = "specify the next")
    private int next;
}