msearch
suspend fun msearch(allowNoIndices: Boolean? = null, cssMinimizeRoundtrips: Boolean? = null, expandWildcards: ExpandWildCards? = null, ignoreThrottled: Boolean? = null, ignoreUnavailable: Boolean? = null, maxConcurrentSearches: Int? = null, maxConcurrentShardRequests: Int? = null, preFilterShardSize: Int? = null, routing: String? = null, searchType: SearchType? = null, typedKeys: Boolean? = null, block: MsearchRequest.() -> Unit): MultiSearchResponse