void releaseOffHeapRefIfRegionBeingClosedOrDestroyed(RegionEntryContext context, Object ref) {
    if (isOffHeapReference(ref) && isThisRegionBeingClosedOrDestroyed(context)) {
      ((Releasable) this).release();
    }
  }
To fix bug 49901 if v is a GatewaySenderEventImpl then make a heap copy of it if it is offheap.

@return the value to provide to the gii request; null if no value should be provided.
geode-core/src/main/java/org/apache/geode/internal/cache/entries/AbstractRegionEntry.java