/// <summary>
        /// Browse
        /// </summary>
        /// <param name="endpoint"></param>
        /// <param name="request"></param>
        /// <returns></returns>
        public async Task <BrowseResponseApiModel> BrowseAsync(
            EndpointApiModel endpoint, BrowseRequestInternalApiModel request)
        {
            if (request == null)
            {
                throw new ArgumentNullException(nameof(request));
            }
            if (endpoint == null)
            {
                throw new ArgumentNullException(nameof(endpoint));
            }
            var result = await _browse.NodeBrowseFirstAsync(
                endpoint.ToServiceModel(), request.ToServiceModel());

            return(result.ToApiModel());
        }
        /// <summary>
        /// Browse
        /// </summary>
        /// <param name="request"></param>
        /// <returns></returns>
        public async Task <BrowseResponseApiModel> BrowseAsync(
            BrowseRequestInternalApiModel request)
        {
            kBrowseAsync.Inc();
            BrowseResponseApiModel model;

            using (kBrowseHistAsync.NewTimer()) {
                if (request == null)
                {
                    throw new ArgumentNullException(nameof(request));
                }
                var result = await _browse.NodeBrowseFirstAsync(
                    await _twin.GetEndpointAsync(), request.ToServiceModel());

                model = result.ToApiModel();
            }
            return(model);
        }