code: public void setDefaultUri(String defaultUri) {
  
          if (m_frozen) {
              throw new CmsRuntimeException(Messages.get().container(Messages.ERR_CONFIG_FROZEN_0));
          }
          m_defaultUri = defaultUri;
      }
docs: Sets the default URI, this is only allowed during configuration.<p>
  
  If this method is called after the configuration is finished,
  a <code>RuntimeException</code> is thrown.<p>
  
  @param defaultUri the defaultUri to set