* A BufferedStore maintains a sparsely populated map of pages corresponding to an extremely large server-side dataset.Ext.Error.raise('Cannot load a buffered store with local data - the store is a map of remote data');// Then we must prefetch the new page 1, and when that arrives, reload the visible part of the Store// Then we must prefetch the new page 1, and when that arrives, reload the visible part of the StoreExt.Error.raise('LoadData may not be used on a buffered store - the store is a map of remote data');