private void updateDiskGCRVV(RegionVersionVector diskRVV, RegionVersionVector inMemoryRVV,
      VersionSource member) {
    long diskVersion = diskRVV.getVersionForMember(member);
    long memoryGCVersion = inMemoryRVV.getGCVersion(member);

    // If the GC version is less than what we have on disk, go ahead
    // and record it.
    if (memoryGCVersion <= diskVersion) {
      diskRVV.recordGCVersion(member, memoryGCVersion);
    }

  }
Update the on disk GC version for the given member, only if the disk has actually recorded all
of the updates including that member.

@param diskRVV the RVV for what has been persisted
@param inMemoryRVV the RVV of what is in memory
@param member The member we're trying to update
geode-core/src/main/java/org/apache/geode/internal/cache/DiskStoreImpl.java