Migrate to null-safetey https://dart.dev/null-safety/migration-guide - `pub outdated --mode=null-safety` - `dart pub upgrade --null-safety` - `dart migrate` - use `variable/*!*/`, `variable/*?*/` and `/*late*/variable` hints as required
Migrate to null-safetey
https://dart.dev/null-safety/migration-guide
pub outdated --mode=null-safetydart pub upgrade --null-safetydart migratevariable/*!*/,variable/*?*/and/*late*/variablehints as required