@Override
  void removeSenderFromAdvisor(InternalDistributedMember sender, int serial,
      boolean regionDestroyed) {
    getDistributionAdvisor().removeIdWithSerial(sender, serial, regionDestroyed);
  }
Returns true if the role is currently present this region's membership.
geode-core/src/main/java/org/apache/geode/internal/cache/DistributedRegion.java