@@ -506,10 +506,23 @@
 		removePageIfEmpty(_page);
 	}
 
 	[super dealloc];
 }
+
+- (void *)mutableItems
+{
+	return _items;
+}
+
+- (void *)mutableItemAtIndex: (size_t)idx
+{
+	if (idx >= _count)
+		@throw [OFOutOfRangeException exception];
+
+	return _items + idx * _itemSize;
+}
 
 - (void)zero
 {
 	of_explicit_memset(_items, 0, _count * _itemSize);
 }