@Override
  public String toString() {
    return getClass().getSimpleName() + "[" + "regionPath="
        + regionPath + "; indexName=" + indexName
        + "; queryExecutions=" + queryExecutions + "; queryExecutionTime="
        + queryExecutionTime + "; queryRateAverageLatency="
        + queryRateAverageLatency + "; queryExecutionsInProgress="
        + queryExecutionsInProgress + "; queryExecutionTotalHits="
        + queryExecutionTotalHits + "; updates=" + updates
        + "; updateTime=" + updateTime + "; updateRateAverageLatency="
        + updateRateAverageLatency + "; updatesInProgress="
        + updatesInProgress + "; commits=" + commits
        + "; commitTime=" + commitTime + "; commitRateAverageLatency="
        + commitRateAverageLatency + "; commitsInProgress="
        + commitsInProgress + "; documents=" + documents + "]";
  }
Outputs the string message containing all the stats stored for the {@link LuceneIndex}

@return the string message containing all the stats stored for the Lucene Index
geode-lucene/src/main/java/org/apache/geode/cache/lucene/management/LuceneIndexMetrics.java