@Override
    public String execute(CommandContext commandContext, String[] args) {
        StringBuilder result = new StringBuilder();
        result.append(listProvider());
        result.append(listConsumer());

        return result.toString();
    }
@Test
    void testExecute() {
        Ls ls = new Ls(frameworkModel);
        String result = ls.execute(Mockito.mock(CommandContext.class), new String[0]);
        System.out.println(result);
        /**
         * As Provider side:
         * +--------------------------------+---+
         * |      Provider Service Name     |PUB|
         * +--------------------------------+---+
         * |org.apache.dubbo.qos.DemoService| N |
         * +--------------------------------+---+
         * As Consumer side:
         * +--------------------------------+---+
         * |      Consumer Service Name     |NUM|
         * +--------------------------------+---+
         * |org.apache.dubbo.qos.DemoService| 0 |
         * +--------------------------------+---+
         */
    }