public function background_update()
{
add_action('wp_update_plugins', array(&$this, 'forced_meta_update_plugins'));
add_action('wp_update_themes', array(&$this, 'forced_meta_update_themes'));
add_action('wp_ajax_nopriv_ithemes_sync_request', array(&$this, 'forced_meta_update_remote_management'));
add_action('update_option_auto_updater.lock', array(&$this, 'forced_meta_update_remote_management'));
}