Hi so I did this to try to resolve The argument type 'String? Function(String)' can't be assigned to the parameter type 'String?)?'

But it still complains about that error message I thought the //do something will fix the issue ,but it still didn't work. Flutter code below

 

if (inValue.length == 0) {
//do something
return "Please enter username";
}
return null;
},

Write a program called Lab 5 that has 3 methods and a main method:
1) Method isUserNameValid has 1 parameter of type string and the method returns a value of type
boolean. If the parameter has less than 8 characters then the method returns false, otherwise it
returns true.
2) Method compare has 3 parameters all of type int and has a String return type. This method will
return
a. “All Same” if all 3 parameters are equal,
b. “All Different” if all 3 parameters are different.
c. “Mix number(s)” two of the numbers are the same and the 3rd is different.
3) Method isValid has 1 parameter of type int and returns a boolean value; the method returns true if
the parameter is in the range 0,…,100 inclusive, otherwise the method returns false.
4) Main method. I want you to test methods isValid & isUsernameValid one time with a valid data
and another time with an invalid data. As for method compare test it 3 times so you can get the 3
different possible outcomes.
Example to test the isUserNameValid method

How to resolve this error message in flutter - library_private_types_in_public_api

The line of code it's complaining is  this -

_MyPageState createState() => _MyPageState();



The flutter code lines - class MyPage extends StatefulWidget {
const MyPage({super.key});

@override
_MyPageState createState() => _MyPageState();
}

Hi, the data that is populating the Supplier Field is from this string object in bold that is one of this variable parameters:  var supplierField = form.addField('custpage_supplier', 'select', 'Supplier', 'customrecord_reorder_suppliers').setLayoutType('startrow');

How do I go about retrieving the suppliers name and reordering the name view from this internal ID 'customrecord_reorder_suppliers'. This ID/string object is to a custom table in NetSuite that houses the supplier information. *Please see screenshot of suppliers table*

I have tried: var supplierName = 'customrecord_reorder_suppliers'.toString().split(' ').reverse().join(' ');. To reassign that string object so I could call it in a function but it still did not work. 

If needed we can get on a chat to discuss this in more detail. Please let me know.