PrivateInFinalClassRule fails with traits containing an abstract protected method implemented in a final class

[kayw-geek]

Description

The PrivateInFinalClassRule in PHPStan is currently failing under the following scenario:

When a trait declares an abstract protected method and a final class uses this trait and implements the abstract method, PHPStan issues an error due to the implemented method being protected instead of private. However, I believe that the implemented abstract method should retain the same access modifier, which is protected.

Steps to Reproduce

1. Create a trait with an abstract protected method:

   trait ExampleTrait {
       abstract protected function exampleMethod();
   }

2. Create a final class that uses the trait and implements the abstract method with a protected access modifier:

   final class ExampleClass {
       use ExampleTrait;
   
       protected function exampleMethod() {
           // implementation
       }
   }

3. Run PHPStan analysis on the above code

Expected Behavior

PHPStan should not issue an error when a final class implements an abstract protected method from a trait.