* In peregrine log error : https://mail.google.com/mail/?shva=1#label/_Peregrine/127f30a6b878ff20
   * Downloaded new common-collections from http://commons.apache.org/collections/download_collections.cgi *
   * http://www.sodeso.nl/?p=80
   * or http://commons-collections.darwinports.com/
 * Empty() is not listed in http://commons.apache.org/collections/api-2.1.1/org/apache/commons/collections/CollectionUtils.html
 * maybe in Peregrine common. collections??