docs: public String img(String target, CmsImageScaler scaler, Map<String, String> attributes, boolean partialTag) {
  
          try {
              return CmsJspTagImage.imageTagAction(target, scaler, attributes, partialTag, getRequest());
          } catch (Throwable t) {
              handleException(t);
          }
          CmsMessageContainer msgContainer = Messages.get().container(
              Messages.GUI_ERR_IMG_SCALE_2,
              target,
              scaler == null ? "null" : scaler.toString());
          return getMessage(msgContainer);
      }