private static function _buildServiceContainer()
 {
     /**
      * First, record the root path.
      */
     if (!defined('TUBEPRESS_ROOT')) {
         define('TUBEPRESS_ROOT', self::_calculateTubePressRoot());
     }
     if (!defined('TUBEPRESS_VERSION')) {
         /**
          * This is set to the actual version during packaging.
          */
         define('TUBEPRESS_VERSION', '99.99.99');
     }
     if (!isset(self::$_PRIMARY_BOOTSTRAPPER)) {
         /**
          * Finally, load the primary bootstrapper and use it to obtain the service container.
          */
         if (!class_exists('tubepress_internal_boot_PrimaryBootstrapper', false)) {
             require TUBEPRESS_ROOT . '/src/php/classes/internal/tubepress/internal/boot/PrimaryBootstrapper.php';
         }
         self::$_PRIMARY_BOOTSTRAPPER = new tubepress_internal_boot_PrimaryBootstrapper();
     }
     self::$SERVICE_CONTAINER = self::$_PRIMARY_BOOTSTRAPPER->getServiceContainer();
 }