public String getNamespace() {
        return namespace;
    }
@Test
    public void testPrefixes() {
        Config configInstance = Mockito.mock(Config.class);

        InternalPrefixedConfig config = new InternalPrefixedConfig(configInstance);
        Assert.assertEquals("", config.getNamespace());

        config = new InternalPrefixedConfig(configInstance, "foo");
        Assert.assertEquals("foo.", config.getNamespace());

        config = new InternalPrefixedConfig(configInstance, "foo", "bar");
        Assert.assertEquals("foo.bar.", config.getNamespace());
    }