///<summary>GET on /_migration/deprecations <para>http://www.elastic.co/guide/en/elasticsearch/reference/current/migration-api-deprecation.html</para></summary>
		///<param name = "requestParameters">Request specific configuration such as querystring parameters &amp; request specific connection settings.</param>
		public TResponse DeprecationInfo<TResponse>(DeprecationInfoRequestParameters requestParameters = null)
			where TResponse : class, IElasticsearchResponse, new() => DoRequest<TResponse>(GET, "_migration/deprecations", null, RequestParams(requestParameters));
		///<summary>GET on /{index}/_migration/deprecations <para>http://www.elastic.co/guide/en/elasticsearch/reference/current/migration-api-deprecation.html</para></summary>
		///<param name = "index">Index pattern</param>
		///<param name = "requestParameters">Request specific configuration such as querystring parameters &amp; request specific connection settings.</param>
		public TResponse DeprecationInfo<TResponse>(string index, DeprecationInfoRequestParameters requestParameters = null)
			where TResponse : class, IElasticsearchResponse, new() => DoRequest<TResponse>(GET, Url($"{index:index}/_migration/deprecations"), null, RequestParams(requestParameters));
 public Task <TResponse> DeprecationInfoAsync <TResponse>(DeprecationInfoRequestParameters requestParameters = null, CancellationToken ctx = default)
     where TResponse : class, ITransportResponse, new() => DoRequestAsync <TResponse>(GET, "_migration/deprecations", ctx, null, RequestParams(requestParameters));