public static HttpHandlerBuilder ReturnDocs(this HttpResponseBuilder builder, IEnumerable <object> documents)
        {
            var docs     = documents.ToList();
            var response = new
            {
                hits = new
                {
                    hits  = docs.Select(doc => new { _source = doc }).ToList(),
                    total = docs.Count
                }
            };

            return(builder.Respond(response));
        }