private IList GetData()
{
var projections = GridViewExtension.GetColumnProjections(_layoutEntityName);
var fetchColumns = projections.Select(p => string.Format("{0} AS {1}", p.QueryExpression, p.Projection)).ToArray();
var selector = string.Format("new({0})", string.Join(",", fetchColumns));
var criteria = _context.GetFilters();
return(ObjectSpace.GetObjectQuery(_layoutEntityName, selector, criteria).ToList());
}