code: protected void cleanUp() {
  
          m_importResource = null;
          m_importZip = null;
          m_report = null;
          m_linkStorage = null;
          m_linkPropertyStorage = null;
          m_groupsToCreate = null;
          m_cms = null;
      }
docs: Cleans up member variables after the import is finished.<p>
  
  This is required since there is only one instance for
  each import version that is kept in memory and reused.<p>