public DnsName getHost() {
        return host;
    }
@Test
    public void setFqdn() {
        DummyConnectionConfiguration.Builder builder = newUnitTestBuilder();

        final String fqdn = "foo.example.org";
        builder.setHost(fqdn);

        DummyConnectionConfiguration connectionConfiguration = builder.build();
        assertEquals(fqdn, connectionConfiguration.getHost().toString());
    }