code: @Override
  	public String getLayerContribution(HttpServletRequest request,
  			LayerContributionType type, Object arg) {
  		final String sourceMethod = "getLayerContribution"; //$NON-NLS-1$
  		boolean isTraceLogging = log.isLoggable(Level.FINER);
  		if (isTraceLogging) {
  			log.entering(sourceClass, sourceMethod, new Object[]{request, type, arg});
  		}
  		String result = ""; //$NON-NLS-1$
  		if (type == LayerContributionType.END_RESPONSE) {
  			if (TypeUtil.asBoolean(request.getAttribute(WARN_DEPRECATED_USE_OF_MODULES_QUERYARG))) {
  				result += MessageFormat.format(CONSOLE_WARNING_MSG_FMT,
  						new Object[]{
  							Messages.AbstractHttpTransport_2
  						}
  				);
  			}
  			if (TypeUtil.asBoolean(request.getAttribute(WARN_DEPRECATED_USE_OF_REQUIRED_QUERYARG))) {
  				result += MessageFormat.format(CONSOLE_WARNING_MSG_FMT,
  						new Object[]{
  							Messages.AbstractHttpTransport_3
  						}
  				);
  			}
  
  		}
  		if (isTraceLogging) {
  			log.exiting(sourceClass, sourceMethod, result);
  		}
  		return result;
  	}
docs: /* (non-Javadoc)
  @see com.ibm.jaggr.service.transport.IHttpTransport#getLayerContribution(javax.servlet.http.HttpServletRequest, com.ibm.jaggr.service.transport.IHttpTransport.LayerContributionType, java.lang.String)