public async Task <IEnumerable <IPicklistState> > GetAsync(ICriterion filter, IList <string> orders = null, int firstResult = 0, int maxResults = int.MaxValue, IList <string> fields = null)
{
IEnumerable <IPicklistState> states = null;
var q = new PicklistsGetQuery();
q.FirstResult = firstResult;
q.MaxResults = maxResults;
q.Sort = PicklistProxyUtils.GetOrdersQueryValueString(orders);
q.Fields = PicklistProxyUtils.GetReturnedFieldsQueryValueString(fields, QueryFieldValueSeparator);
q.Filter = PicklistProxyUtils.GetFilterQueryValueString(filter);
var req = new PicklistsGetRequest();
req.Query = q;
var resp = await _ramlClient.Picklists.Get(req);
PicklistProxyUtils.ThrowOnHttpResponseError(resp);
states = (resp.Content == null) ? null : resp.Content.Select(e => e.ToPicklistState());
return(states);
}