@Override
  public String toString() {
    String result = super.toString();
    RegionEntry re = this.re;
    if (re != null) {
      result += ", " + re.getKey();
    }
    return result;
  }
Returns the tasks region entry if it "checks" out. The check is to see if the region entry
still exists.

@throws EntryNotFoundException if the task no longer has a region entry or if the region entry
        it has is removed.
geode-core/src/main/java/org/apache/geode/internal/cache/EntryExpiryTask.java