code: protected void warnVisible (SceneBlock block, Rectangle sbounds)
      {
          log.warning("Block visible during resolution " + block +
                      " sbounds:" + StringUtil.toString(sbounds) +
                      " vbounds:" + StringUtil.toString(_vbounds) + ".");
      }
docs: Issues a warning to the error log that the specified block became visible prior to being
  resolved. Derived classes may wish to augment or inhibit this warning.