private void updateAddressesAndSizes(long fullKeyAddress) {
            updateAddressesAndSizes(
                    taskMemoryManager.getPage(fullKeyAddress),
                    taskMemoryManager.getOffsetInPage(fullKeyAddress));
        }
Memory page containing the record. Only set if created by {@link BytesToBytesMap#iterator()}.
indexr-query-opt/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java