builder.field(NUMBER_OF_NODES, response.getNumberOfNodes());
            }
            if (fieldSet.contains(NUMBER_OF_DATA_NODES)) {
                builder.field(NUMBER_OF_DATA_NODES, response.getNumberOfDataNodes());
            }
            if (fieldSet.contains(ACTIVE_PRIMARY_SHARDS)) {
                builder.field(ACTIVE_PRIMARY_SHARDS, response.getActivePrimaryShards());
            }