public static void update(DiskEntry entry, InternalRegion region, @Unretained Object newValue)
        throws RegionClearedException {
      update(entry, region, newValue, null);
    }
Writes the key/value object stored in the given entry to disk

@see DiskRegion#put
geode-core/src/main/java/org/apache/geode/internal/cache/entries/DiskEntry.java