protected override async Task <bool> GetDataAsync()
{
var resource = new DocumentResource(Context, DataViewMode.HasValue ? DataViewMode.Value : Api.DataViewMode.Live);
_results = await resource.GetDocumentsAsync(DocumentListName, startIndex : StartIndex, pageSize : PageSize, sortBy : SortBy, filter : Filter, responseFields : ResponseFields);
TotalCount = _results.TotalCount;
PageCount = _results.PageCount;
PageSize = _results.PageSize;
return(_results.Items != null && _results.Items.Count > 0);
}