public void recordGCVersions(RegionVersionVector<T> other) {
    assert other.memberToGCVersion != null : "incoming gc version set is null";
    recordGCVersion(other.myId, other.localGCVersion.get());
    for (Map.Entry<T, Long> entry : other.memberToGCVersion.entrySet()) {
      recordGCVersion(entry.getKey(), entry.getValue());
    }
  }
record all of the GC versions in the given vector
geode-core/src/main/java/org/apache/geode/internal/cache/versions/RegionVersionVector.java