Vandad Nahavandipoor on Twitter: "Did you know that in #Dart, you can #extend #functions? 🤯Any function defined with a #typedef can be extended. Here I show you how to turn an "onPressed" #
![Error: The argument type 'Function?' can't be assigned to the parameter type 'void Function()?' - YouTube Error: The argument type 'Function?' can't be assigned to the parameter type 'void Function()?' - YouTube](https://i.ytimg.com/vi/YanWDEuISRI/maxresdefault.jpg)
Error: The argument type 'Function?' can't be assigned to the parameter type 'void Function()?' - YouTube
![This function has a return type of 'Widget', but doesn't end with a return statement. Try adding a return statement, or changing the return type to ' void'.dart(missing_return) · Issue #1 · itsatifsiddiqui/providerLogin · This function has a return type of 'Widget', but doesn't end with a return statement. Try adding a return statement, or changing the return type to ' void'.dart(missing_return) · Issue #1 · itsatifsiddiqui/providerLogin ·](https://user-images.githubusercontent.com/21271698/63667216-84774c00-c7f0-11e9-8cac-e84049afea85.png)
This function has a return type of 'Widget', but doesn't end with a return statement. Try adding a return statement, or changing the return type to ' void'.dart(missing_return) · Issue #1 · itsatifsiddiqui/providerLogin ·
![flutter - The argument type 'void Function(Map<String, bool>)' can't be assigned to the parameter type 'Map<String, bool>' - Stack Overflow flutter - The argument type 'void Function(Map<String, bool>)' can't be assigned to the parameter type 'Map<String, bool>' - Stack Overflow](https://i.stack.imgur.com/ehf49.png)