![flutter - Null Related Error - The argument type 'String? Function(String)' can't be assigned to the parameter type 'String? Function(String?)?' - Stack Overflow flutter - Null Related Error - The argument type 'String? Function(String)' can't be assigned to the parameter type 'String? Function(String?)?' - Stack Overflow](https://i.stack.imgur.com/Gco6Q.png)
flutter - Null Related Error - The argument type 'String? Function(String)' can't be assigned to the parameter type 'String? Function(String?)?' - Stack Overflow
![Exploring String methods in Dart. In my last article, I talked about… | by Darshan Kawar | Flutter Community | Medium Exploring String methods in Dart. In my last article, I talked about… | by Darshan Kawar | Flutter Community | Medium](https://miro.medium.com/max/1208/1*Y2EjdXtirW4LS0D87L_0Iw.png)
Exploring String methods in Dart. In my last article, I talked about… | by Darshan Kawar | Flutter Community | Medium
![Exploring String methods in Dart. In my last article, I talked about… | by Darshan Kawar | Flutter Community | Medium Exploring String methods in Dart. In my last article, I talked about… | by Darshan Kawar | Flutter Community | Medium](https://miro.medium.com/max/1000/1*AGfRqZ4qrgSkFpu1Aug3Dg.png)