Open p238049y opened 2 years ago
https://zenn.dev/kazutxt/books/flutter_practice_introduction/viewer/intermediate_nullsafety
をやってみよう
https://zenn.dev/kazutxt/books/flutter_practice_introduction/viewer/intermediate_nullsafety#nullsafety%E3%81%B8%E3%81%AE%E7%A7%BB%E8%A1%8C
ここを追加した
https://zenn.dev/kazutxt/books/flutter_practice_introduction/viewer/intermediate_nullsafety
をやってみよう