NEST refresh flush forcemerge

        public void Refresh()
        {
            client.Refresh("employee");
        }

        public void Flush()
        {
            client.Flush("employee");
        }

        /// <summary>
        /// _optimize=ForceMerge
        /// </summary>
        public void ForceMerge()
        {
            client.ForceMerge("employee");
        }