Backend\Core\Engine\Language::getMessage PHP Method

    public static function getMessage($key, $module = null)
    {
        trigger_error('Backend\\Core\\Engine\\Language is deprecated.
             It has been moved to Backend\\Core\\Language\\Language', E_USER_DEPRECATED);
        return parent::getMessage($key, $module);
    }

 /**
  * Load the data.
  * This will also set some warnings if needed.
  */
 private function loadData()
 {
     // inform that the module is not installed yet
     if (!BackendModel::isModuleInstalled($this->currentModule)) {
         $this->warnings[] = array('message' => BL::getMessage('InformationModuleIsNotInstalled'));
     }
     // fetch the module information
     $moduleInformation = BackendExtensionsModel::getModuleInformation($this->currentModule);
     $this->information = $moduleInformation['data'];
     $this->warnings = $this->warnings + $moduleInformation['warnings'];
 }