extension NullableStringX on String? {
  bool get isNullOrBlank => this == null || this.trim().isEmpty();
}

final String? s = null;
s.isNullOrBlank; // true

'   '.isNullOrBlank // true
'test'.isNullOrBlank // false

extension StringX on String {
  String capitalize() => this.trim().isEmpty ? this : '${this.trim()[0].toUpperCase()}${this.trim().substring(1).toLowerCase()}';

  String capitalizeSentense() => this.split('.').map((e) => e.capitalize()).join('. ').trim();
}

'мое ПрЕдЛоЖеНиЕ РАЗНОГО размера'.capitalize() // Мое предложение разного размера

'три. слова. точка.'.capitalizeSentense() // Три. Слова. Точка.

extension StringX on String {
  void copyToClipboard() => Clipboard.setData(ClipboardData(text: this));
}

flutter build appbundle --obfuscate --split-debug-info=/symbols

flutter symbolize \
  -i <stack-trace-file> \
  -d <obfuscated-symbols-file>

firebase crashlytics:symbols:upload --app=<firebase-app-id> <path-to-symbols>/symbols

RichText(
  text: TextSpan(
    children: [
      TextSpan(text: ‘Обычный текст. ‘, style: TextStyle(fontSize: 14, color: Colors.black)),
      TextSpan(text: Жирный текст. ‘, style: TextStyle(fontSize: 14, color: Colors.black, fontWeight: FontWeight.bold)),
      TextSpan(text: ‘Снова обычный текст.‘, style: TextStyle(fontSize: 14, color: Colors.black)),
    ],
  ),
);

Text.rich(
  TextSpan(
    children: [
      TextSpan(text: ‘Обычный текст. ‘),
      TextSpan(text: Жирный текст. ‘, style: TextStyle(fontSize: 14, color: Colors.black, fontWeight: FontWeight.bold)),
      TextSpan(text: ‘Снова обычный текст.‘),
    ],
  ),
);

@override
void initState() {
  super.initState();

  // Your code here
}

@override
void dispose() {
  // Your code here

  super.dispose();
}

@override
Future<void> dispose() async {
  // Your code here

  super.dispose();
}

extension DateTimeX on DateTime {
  bool get isToday {
    final now = DateTime.now();
    return day == now.day && month == now.month && year == now.year;
  }

  bool get isTomorrow {
    final tomorrow = DateTime.now().add(Duration(days: 1));
    return day == tomorrow.day + 1 && month == tomorrow.month && year == tomorrow.year;
  }

  bool get isYesterday {
    final yesterday = DateTime.now().subtract(Duration(days: 1));
    return day == yesterday.day - 1 && month == yesterday.month && year == yesterday.year;
  }
}

extension DateTimeX on DateTime {
  int get daysDiff => this.difference(DateTime.now).inDays;
}