### Question:
CommonUtils { public static Object filterMatchingCollectionElements(Object obj, String pattern, boolean retainInsteadOfFilter) { JsonElement jsonElement = new GsonBuilder().create().toJsonTree(obj); boolean exact=false; if (!Strings.isNullOrEmpty(pattern) && pattern.startsWith("\"")&&pattern.endsWith("\"")) { exact=true; pattern = pattern.substring(1,Math.max(1,pattern.length()-1)); } doRecursiveJsonMatch(jsonElement, pattern, retainInsteadOfFilter,exact); obj = new GsonBuilder().create().fromJson(jsonElement, Object.class); return obj; } private  CommonUtils(); @SuppressWarnings("unchecked") static Map<String, Object> flatNestedMap(String notation, Map<String, Object> nestedMap); static String buildErrorResponse(Exception e); static String convertAttributetoKeyword(String attributeName); @SuppressWarnings("unchecked") static LinkedHashMap<String, Object> flatNestedLinkedHashMap(String notation, Map<String, Object> nestedMap); static Object filterMatchingCollectionElements(Object obj, String pattern, boolean retainInsteadOfFilter); static SSLContext createNoSSLContext(); static String capitailizeWord(String mainStr); static String getEnvironmentForTag(String key);  }### Answer:
@Test public void filterMatchingCollectionElements() { assertEquals(forTest.filterMatchingCollectionElements(), false); }