Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
* First we look up in the report itself, then look into the referenced
	 * message file. Each search uses a reduced form of Java locale-driven
	 * search algorithm: Language&Country, language, default.
	 * 
	 * @param resourceKey
	 *            Resource key of the user defined message.
	 * @param locale
	 *            locale of message, if the input <code>locale</code> is
	 *            <code>null</code>, the locale for the current thread will
	 *            be used instead.
	 * @return the corresponding locale-dependent messages. Return
	 *         <code>""</code> if translation can not be found, or
	 *         <code>resourceKey</code> is blank or <code>null</code>.
	 */
	public String getMessage( String resourceKey, ULocale locale )
	{
		if ( StringUtil.isBlank( resourceKey ) )
			return null;
		if ( locale == null )
			locale = ThreadResources.getLocale( );
		
		String msg = translations.getMessage( resourceKey, locale );
		if ( msg != null )
			return msg;
		
		String baseName = getStringProperty( this, INCLUDE_RESOURCE_PROP );
		if ( baseName == null )
			return null;
		
		msg = BundleHelper.getHelper( this, baseName ).getMessage( resourceKey,