CodeIgniter 3 to 4 Upgrade Helper

How can i use countAllResults like CI4 .

Please write your code according to CI4 syntax without using the upgrade helper feature at all.

If your helper doesn't have that function, how can i extend it?

You cannot extend it. Create your fork project and add code.

Can i use both CI3 and CI4 syntax in the same model ?

No.

Thank you for your reply. There is no way to inherit or extend it without forking the project. I just want to add or modify if there is a missing function in a simple way