How to find closing `]`?

Question

Laravel

PageController:

class PageController extends Controller
{
    public function getIndex()
    {
    }
}

But I can't find where it's coming from ]

Answer 1

Look
at 1. Routes
2. Requests (If it's on one page, then in a specific request)
3. Controllers (If it's on all, then some kind of base controller.)
4. ServiceProviders (Turn off one by one. First half. Then less and watch the result It can only be from custom ones)
Well, there are types and models used in a chain.