@Test
  public void testCallbackNotExplicitlyDeclarableIsStillOK() throws Exception {
    setXmlFile(findFile("callbackNotDeclarable.xml"));

    getCache();
  }
Tests parsing an XML file that specifies a cache listener that is not {@link Declarable}.
geode-core/src/distributedTest/java/org/apache/geode/cache30/CacheXml66DUnitTest.java