align column to center of flex flutter
// If you want the whole table to be Centered, use the mainAxisAlignment property of Column. ///Column mainAxisAlignment: MainAxisAlignment.center //Center Column contents vertically, crossAxisAlignment: CrossAxisAlignment.center //Center Column contents horizontally, ///Row mainAxisAlignment: MainAxisAlignment.center //Center Row contents horizontally, crossAxisAlignment: CrossAxisAlignment.center //Center Row contents vertically,
