code: @Override
      public String getLocalizedMessage() {
  
          if (m_exceptions.isEmpty()) {
              return null;
          }
          StringBuffer result = new StringBuffer(128);
          Iterator<CmsException> it = m_exceptions.iterator();
          while (it.hasNext()) {
              CmsException ex = it.next();
              result.append(ex.getLocalizedMessage());
              if (it.hasNext()) {
                  result.append('\n');
              }
          }
          return result.toString();
      }
docs: Returns a localized message composed of all contained exceptions.<p>
  
  @see java.lang.Throwable#getLocalizedMessage()