A line of code that does not know the meaning

[liamhao]

framework/src/Illuminate/Routing/RouteFileRegistrar.php

Line 33 in 7ad5e59

$router = $this->router;

It's this line. What does it do?

[driesvints]

It opens up the $router variable to route files like https://github.com/laravel/laravel/blob/8.x/routes/web.php