code: public function boot()
  	{
  		if ($this->booted) return;
  
  		$this->booting = true;
  
  		$this->registerProviders();
  
  		foreach ($this->configurators as $configurator) {
  			$this->invokeConfigurator($configurator);
  		}
  
  		$this->resolveStack();
  
  		$this->booted = true;
  	}
docs: Boot the application.
  
  @return void