src/Bootstrap/BootstrapServiceProvider.php
public function register()
    {
        $this->app->singleton(Bootstrap::class);
        $this->app->singleton(FormErrorProviderContract::class, FormErrorProvider::class);
        $this->app->singleton(OldFormInputProviderContract::class, OldFormInputProvider::class);
        $this->app->bind(FormStateContract::class, FormState::class);
    }
public function register()
    {
        $this->app->singleton(Bootstrap::class);
        $this->app->singleton(FormErrorProviderContract::class, FormErrorProvider::class);
        $this->app->singleton(OldFormInputProviderContract::class, OldFormInputProvider::class);
        $this->app->bind(FormStateContract::class, FormState::class);
    }
Register the application services.