private static void writeToDisk(DiskEntry entry, InternalRegion region, boolean async)
        throws RegionClearedException {
      writeToDisk(entry, region, async, null);
    }
Returns true if the given object is off-heap and it is worth wrapping a reference to it
instead of copying its data to the heap. Currently all StoredObject's with a refCount are
wrapped.
geode-core/src/main/java/org/apache/geode/internal/cache/entries/DiskEntry.java