100% sound null safety. Records, patterns, and class modifiers. And a peek into the future. — Hello from Google I/O 2023. Today, live from Mountain View, we’re announcing Dart 3 — the largest Dart release to date! Dart 3 contains three major advancements. First, we’ve completed the journey to 100% sound null safety. Second, we’ve added major new language features for records, patterns, and class modifiers…