/// <summary>
/// Save for individual item
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="t"></param>
public static void Save <T>(T t)
{
var batch = _context.CreateBatchWrite <T>();
batch.AddPutItem(t);
_context.ExecuteBatchWriteAsync(new BatchWrite[] { batch });
//batch.ExecuteAsync();
}