<?php

use Bausch\LaravelCornerstone\Http\Controllers\KeepAliveController;

$router->get('lbausch/laravel-cornerstone/keepalive', KeepAliveController::class.'@keepalive');

<?php

use Bausch\LaravelCornerstone\Http\Controllers\KeepAliveController;

Route::get('lbausch/laravel-cornerstone/keepalive', KeepAliveController::class.'@keepalive');

Use Route instead of $router
Use Route instead of $router
