private void addToken(String token, int tokenCount, TokenCountPriorityQueue queue) {
        if (queue.top() == null || queue.size() < topN || tokenCount >= queue.top().getValue()) {
            queue.insertWithOverflow(new TokenIntPair(token, tokenCount));
        }

    }
Computes some corpus contrast statistics.
<p>
Not thread safe.
tika-eval/tika-eval-core/src/main/java/org/apache/tika/eval/core/tokens/TokenContraster.java