public JMXUriBuilder withObjectPropertiesReference(String aReferenceToHashtable) {
        if (aReferenceToHashtable.startsWith("#")) {
            addProperty("objectProperties", aReferenceToHashtable);
        } else {
            addProperty("objectProperties", "#" + aReferenceToHashtable);
        }
        return this;
    }
@Test
    public void withObjectPropertiesReference() {
        assertEquals("jmx:platform?objectProperties=#op", new JMXUriBuilder().withObjectPropertiesReference("#op").toString());
    }