PagesManager.prototype.|>MARK_OCCURRENCES:_implem^entation<| = null;
        if (!this.|>MARK_OCCURRENCES:_implementation<|) {
        this.|>MARK_OCCURRENCES:_implementation<|.loadPage(id, callback);
        if (!this.|>MARK_OCCURRENCES:_implementation<|) {
        this.|>MARK_OCCURRENCES:_implementation<|.getIds(callback);
        if (!this.|>MARK_OCCURRENCES:_implementation<|) {
        this.|>MARK_OCCURRENCES:_implementation<|.storePage(page);
        if (this.|>MARK_OCCURRENCES:_implementation<|) {
        this.|>MARK_OCCURRENCES:_implementation<| = impl;
 
     |