protected synchronized void initRMLWrappers() {
      if (isInitialized() && hasListener()) {
        initPostCreateRegionMembershipListeners(getRegionAdvisor().adviseAllPRNodes());
      }
    }
Used to get membership events from our advisor to implement RegionMembershipListener
invocations. This is copied almost in whole from DistributedRegion

@since GemFire 5.7
geode-core/src/main/java/org/apache/geode/internal/cache/PartitionedRegion.java