@Override
        public void accept(String fieldName, byte[] utf8Data, int offset, int length) {
            traversed.put(fieldName, new String(utf8Data, offset, length, StandardCharsets.UTF_8));
        }
Asserts that the expected fields are what is returned from every access method of Hit
container-search/src/test/java/com/yahoo/prelude/fastsearch/SlimeSummaryTestCase.java