public List <Retrieval> GetRetrievalFormCommentsForAdjustmentVoucher() { List <Retrieval> retrievalwithcomments = scservice.GetRetrievalFormCommentsForAdjustmentVoucher(); if (retrievalwithcomments != null || retrievalwithcomments.Count != 0) { return(retrievalwithcomments); } else { return(new List <Retrieval>()); //if no retrieval with adjustment voucher comments, return empty list so front end don't need to handle error } }