public Map<String, MutableInt> getTokens(String field) {
        Map<String, MutableInt> ret = map.get(field);
        if (ret == null) {
            return Collections.emptyMap();
        }
        return ret;
    }
@deprecated use {@link CompositeTextStatsCalculator}
with {@link TokenEntropy},
{@link TokenLengths}
and {@link TopNTokens}.
tika-eval/tika-eval-core/src/main/java/org/apache/tika/eval/core/tokens/TokenCounter.java