convertToHindiNumbers function Null safety

String convertToHindiNumbers(
  1. String str
)

arabic numbers are ٠١٢٣٤٥٦٧٨٩

Implementation

String convertToHindiNumbers(String str) {
  return str
      .replaceAll('0', '٠')
      .replaceAll('1', '١')
      .replaceAll('2', '٢')
      .replaceAll('3', '٣')
      .replaceAll('4', '٤')
      .replaceAll('5', '٥')
      .replaceAll('6', '٦')
      .replaceAll('7', '٧')
      .replaceAll('8', '٨')
      .replaceAll('9', '٩');
}