public void removeExceptionsFor(DistributedMember mbr, long version) {
    RegionVersionHolder<T> holder = memberToVersion.get(mbr);
    if (holder != null) {
      synchronized (holder) {
        holder.removeExceptionsOlderThan(version);
      }
    }
  }
Remove any exceptions for the given member that are older than the given version. This is used
after a synchronization operation to get rid of unneeded history.
geode-core/src/main/java/org/apache/geode/internal/cache/versions/RegionVersionVector.java