@Override
    public Mysql clone() throws CloneNotSupportedException {
        final Mysql config = new Mysql();
        config.setUser(getUser());
        config.setPwd(getPwd());
        config.setCmd(getCmd());
        return config;
    }
@Test
    void testClone() throws CloneNotSupportedException {
        Mysql cloned = mysql.clone();
        assertEquals(mysql.hashCode(), cloned.hashCode());
        assertEquals(mysql, cloned);
    }