DeleteByQueryResult
data class DeleteByQueryResult(val took: Long, val timedOut: Boolean, val total: Long, val deleted: Long, val batches: Int, val versionConflicts: Long, val noops: Long, val retries: BulkScrollRetries, val throttledMillis: Long, val requestsPerSecond: Float, val throttledUntilMillis: Long, val failures: List<BulkScrollFailure>)