code: public static String getLocalizedMessage(CmsMessageContainer container, PageContext context) {
  
          return Messages.getLocalizedMessage(container, context.getRequest());
      }
docs: Returns the String for the given CmsMessageContainer localized to the current user's locale
  if available or to the default locale else.
  <p>
  
  This method is needed for localization of non- {@link org.opencms.main.CmsException}
  instances that have to be thrown here due to API constraints (javax.servlet.jsp).
  <p>
  
  @param container A CmsMessageContainer containing the message to localize.
  @param context The page context that is known to any calling
  {@link javax.servlet.jsp.tagext.TagSupport} instance (member
  <code>pageContext</code>).
  @return the String for the given CmsMessageContainer localized to the current user's locale
  if available or to the default locale else.
  <p>