Grav\Plugin\Admin\Admin::setMessage PHP Méthode

    public function setMessage($msg, $type = 'info')
    {
        /** @var Message $messages */
        $messages = $this->grav['messages'];
        $messages->add($msg, $type);
    }

 /**
  * Save the current page in a different language. Automatically switches to that language.
  *
  * @return bool True if the action was performed.
  */
 protected function taskSaveas()
 {
     if (!$this->authorizeTask('save', $this->dataPermissions())) {
         return false;
     }
     $data = (array) $this->data;
     $language = $data['lang'];
     if ($language) {
         $this->grav['session']->admin_lang = $language ?: 'en';
     }
     $uri = $this->grav['uri'];
     $obj = $this->admin->page($uri->route());
     $this->preparePage($obj, false, $language);
     $file = $obj->file();
     if ($file) {
         $filename = $this->determineFilenameIncludingLanguage($obj->name(), $language);
         $path = $obj->path() . DS . $filename;
         $aFile = File::instance($path);
         $aFile->save();
         $aPage = new Page();
         $aPage->init(new \SplFileInfo($path), $language . '.md');
         $aPage->header($obj->header());
         $aPage->rawMarkdown($obj->rawMarkdown());
         $aPage->validate();
         $aPage->filter();
         $aPage->save();
         $this->grav->fireEvent('onAdminAfterSave', new Event(['page' => $obj]));
     }
     $this->admin->setMessage($this->admin->translate('PLUGIN_ADMIN.SUCCESSFULLY_SWITCHED_LANGUAGE'), 'info');
     $this->setRedirect('/' . $language . $uri->route());
     return true;
 }