@Override
  public String toString() {
    String str = " Eviction policy " + getEvictionPolicy() + " capacity " + getCapacity();
    if (diskStoreName == null) {
      str += " Overflow Directory " + getOverflowDirectory();
    } else {
      str += " DiskStore Name: " + diskStoreName;
    }
    return str;
  }
Answers the overflow directory for a client queue's overflowed client queue entries.

@return the overflow directory for a client queue's overflowed entries
@since GemFire 5.7
@deprecated as of prPersistSprint2
geode-core/src/main/java/org/apache/geode/internal/cache/ClientSubscriptionConfigImpl.java