public String toString() {
    StringBuilder s = new StringBuilder();
    s.append("{v").append(getEntryVersion());
    s.append("; rv").append(getRegionVersion());
    if (memberID != null) {
      s.append("; mbr=").append(memberID);
    }
    if (distributedSystemId >= 0) {
      s.append("; ds=").append(distributedSystemId);
    }
    s.append("; time=").append(getVersionTimeStamp());
    s.append("}");
    return s.toString();
  }
get rvv internal low bytes. Used by region entries for transferring to storage
geode-core/src/main/java/org/apache/geode/internal/cache/versions/CompactVersionHolder.java