public async Task <BaseResponse <Thing> > GetItem(GetRequest param)
{
var uri = http.GetUri("item", param.AsDictionary());
var request = new HttpRequestMessage(HttpMethod.Get, uri);
var res = await http.SendAsync(request);
var a = res.Content.ReadAsStringAsync().Result;
return(JsonConvert.DeserializeObject <BaseResponse <Thing> >(a));
}