436     * Prepare static variables before processing a {@link get_static} or {@link set_static}
437     * call.
438     */
439    private static function prepare_statics($class) {
440       // _cache_statics_prepared setting must come first to prevent infinite loops when we call
441       // get_static below
442       self::$_cache_statics_prepared[$class] = true;
443
444       // load statics now for DataObject classes
445       if(is_subclass_of($class, 'DataObject')) {
446          $extensions = Object::uninherited_static($class, 'extensions');
447          if($extensions) foreach($extensions as $extension) {
448             if(preg_match('/^([^(]*)/', $extension, $matches)) {
449                $extensionClass = $matches[1];
450                DataObjectDecorator::load_extra_statics($class, $extensionClass);
451             }