@Override
  public String toString() {
    if (timeout == 0) {
      return "NO EXPIRATION";
    }
    return "timeout: " + timeout + ";action: " + action;
  }
Returns a string representation of this <code>ExpirationAttributes</code>. If the timeout is
zero, returns <code>"NO EXPIRATION"</code>.

@return the String representation of this expiration attribute
geode-core/src/main/java/org/apache/geode/cache/ExpirationAttributes.java