Grav\Plugin\Admin\AdminController::taskGpmRelease PHP Метод

    protected function taskGpmRelease()
    {
        if (!$this->authorizeTask('configuration', ['admin.configuration', 'admin.super'])) {
            return false;
        }
        // Default release state
        $release = 'stable';
        $reload = false;
        // Get the testing release value if set
        if ($this->post['release'] == 'testing') {
            $release = 'testing';
        }
        $config = $this->grav['config'];
        $current_release = $config->get('system.gpm.releases');
        // If the releases setting is different, save it in the system config
        if ($current_release != $release) {
            $data = new Data\Data($config->get('system'));
            $data->set('gpm.releases', $release);
            // Get the file location
            $file = CompiledYamlFile::instance($this->grav['locator']->findResource("config://system.yaml"));
            $data->file($file);
            // Save the configuration
            $data->save();
            $config->reload();
            $reload = true;
        }
        $this->admin->json_response = ['status' => 'success', 'reload' => $reload];
        return true;
    }