/**
* Updates a single module according to the data in the request.
*
* @param string $id Module ID.
*
* @return void
*/
private function update_module($id)
{
if (empty($_POST['multilingualpress_modules'][$id])) {
$this->module_manager->deactivate_module($id);
} else {
$this->module_manager->activate_module($id);
}
}