/**
  * Load TCA for a specific table. Since T3 6.1 the complete TCA is loaded.
  * @param string $tablename
  */
 public static function loadTCA($tablename)
 {
     tx_rnbase::load('tx_rnbase_util_TYPO3');
     if (tx_rnbase_util_TYPO3::isTYPO61OrHigher()) {
         if (!is_array($GLOBALS['TCA'])) {
             \TYPO3\CMS\Core\Core\Bootstrap::getInstance()->loadCachedTca();
         }
     } else {
         t3lib_div::loadTCA($tablename);
     }
 }