liwo/app/Utilities/Providers/HiLibraryServiceProvider.php

<?php

namespace App\HiLib\Providers;

use Illuminate\Support\Facades\DB;
use Illuminate\Support\Stringable;
use Illuminate\Support\ServiceProvider;
class HiLibraryServiceProvider extends ServiceProvider
{

    /**
     * Register any application services.
     *
     * Within the register method, you should only bind things into the service container.
     *
     * @return void
     */
    public function register()
    {
        $this->app->singleton(
            \Illuminate\Contracts\Debug\ExceptionHandler::class,
            \App\HiLib\Exceptions\Handler::class
        );

        Stringable::macro('then', function($callback) {
            return new Stringable($callback($this));
        });
    }

    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot()
    {
        DB::enableQueryLog();
    }

    /**
     * Get the services provided by the provider.
     *
     * @return array
     */
    public function provides()
    {
        //
    }
}