
public abstract class ACEM_Sample {
    public void test() {
    }

    public int test1() {
        throw new UnsupportedOperationException("Not implemented");
    }
}

public abstract class ACEM_Sample implements Foo {
    public void test() {
    }

    public int test1() {
        throw new UnsupportedOperationException("Not implemented");
    }
    
    @Override
    public void doFPFoo() {
    }
    
    
}

interface Foo {
    void doFPFoo();
}
add FP for ACEM