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;
|