code: public Map<String, IndexStats> getAllIndicesStats() {
          IndicesStatsRequestBuilder indicesStatsRequestBuilder =
                  admin().indices().prepareStats().all();
          return JMElasticsearchUtil
                  .logRequestQueryAndReturn("getAllIndicesStats",
                          indicesStatsRequestBuilder,
                          indicesStatsRequestBuilder.execute()).getIndices();
      }
docs: Gets all indices stats.
  
  @return the all indices stats