presto-main/src/main/java/io/prestosql/operator/project/PageFieldsToInputParametersRewriter.java/PageFieldsToInputParametersRewriter/Result
class PageFieldsToInputParametersRewriter:        public Result(RowExpression rewrittenExpression, InputChannels inputChannels)
        {
            this.rewrittenExpression = rewrittenExpression;
            this.inputChannels = inputChannels;
        }