$status = $this->importVariables( $requiredVars, $vars );
$installer = $this->parent->getDBInstaller();
$status->merge( $this->importVariables( $installer->getGlobalNames(), $vars ) );
$status = $this->importVariables( $requiredVars, $vars );
$installer = $this->parent->getDBInstaller();
$status->merge( $this->importVariables( $installer->getGlobalNames(), $vars ) );