/**
  * update schema of modelconfig enabled app
  *
  * @param string $appName
  * @param array $modelNames
  * @throws Setup_Exception_NotFound
  */
 public function updateSchema($appName, $modelNames)
 {
     $updateRequired = false;
     $setNewVersions = array();
     foreach ($modelNames as $modelName) {
         $modelConfig = $modelName::getConfiguration();
         $tableName = Tinebase_Helper::array_value('name', $modelConfig->getTable());
         $currentVersion = $this->getTableVersion($tableName);
         $schemaVersion = $modelConfig->getVersion();
         if ($currentVersion < $schemaVersion) {
             $updateRequired = true;
             $setNewVersions[$tableName] = $schemaVersion;
         }
     }
     if ($updateRequired) {
         Setup_SchemaTool::updateSchema($appName, $modelNames);
         foreach ($setNewVersions as $table => $version) {
             $this->setTableVersion($table, $version);
         }
     }
 }