code: public function boot()
      {
          if ($this->booted) {
              return $this;
          }
  
          // If we have pinba, disable it.
          if (extension_loaded('pinba')) {
              ini_set('pinba.enabled', false);
          }
  
          // If we have newrelic, disable it.
          if (extension_loaded('newrelic')) {
              ini_set('newrelic.enabled', false);
          }
  
          // Set timezone.
          if (!empty($this->settings['timezone'])) {
              date_default_timezone_set($this->settings['timezone']);
          }
  
          $this->booted = true;
  
          return $this;
      }
docs: Boot Application.
  
  @return In2pire\Cli\ApplicationInterface
  The called object.