public ApplicationBuilder metadataServicePort(Integer metadataServicePort) {
        this.metadataServicePort = metadataServicePort;
        return getThis();
    }
@Test
    void metadataServicePort() {
        ApplicationBuilder builder = new ApplicationBuilder();
        builder.metadataServicePort(12345);
        Assertions.assertEquals(12345, builder.build().getMetadataServicePort());
    }