private void basicMakeTombstone(InternalRegion region) throws RegionClearedException {
    boolean setValueCompleted = false;
    try {
      setValue(region, Token.TOMBSTONE);
      setValueCompleted = true;
    } finally {
      if (!setValueCompleted && isTombstone()) {
        removePhase2();
      }
    }
  }
This sets the lastModified and lastAccessed time for the entry. Subclasses that do not keep
track of lastAccessed time will ignore the second parameter.

@param lastModified the time of last modification of the entry
@param lastAccessed the time the entry was last accessed
geode-core/src/main/java/org/apache/geode/internal/cache/entries/AbstractRegionEntry.java