code: private String loadMessage(String messageCode) {
  
  		Assert.notNull(messageCode, "messageCode");
  
  		if (logger.isDebugEnabled()) {
  			logger.debug("Resolving label with code '" + messageCode + "'");
  		}
  
  		try {
  			return getMessageSource().getMessage(messageCode, null, getLocale());
  		}
  		catch (NoSuchMessageException e) {
  
  			if (logger.isInfoEnabled()) {
  				logger.info("The message source is unable to find message code [" + messageCode
  						+ "]. Ignoring and returning null.");
  			}
  
  			return null;
  		}
  
  	}
docs: Attempts to load the message corresponding to the given message code
  using this instance's {@link MessageSource} and locale.
  
  @param messageCode The message code that will be used to retrieve the
  message. Must not be null.
  @return The message for the given code, or null if the message code could
  not be found.
  
  @throws IllegalArgumentException if {@code messageCode} is null.