/**
  * Return the single instance of this class
  */
 public static function instance()
 {
     if (!isset(self::$instance) && !self::$instance instanceof self) {
         self::$instance = new self();
     }
     return self::$instance;
 }
Esempio n. 2
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/**
 * Return the oik theme update instance
 * 
 * Fetch the class and get the single instance
 */
function genesis_image_theme_update()
{
    require_once dirname(__FILE__) . "/libs/class-oik-theme-update.php";
    $oik_update = OIK_Theme_Update::instance();
    return $oik_update;
}