Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/css/CssStyleSheet.java
{
	/**
	 * All the external styles the style sheet contains.
	 */
	protected LinkedHashMap styles = new LinkedHashMap( );
	/**
	 * All the collected warnings during the loading.
	 */
	private ArrayList warnings = new ArrayList( );
	/**
	 * The name list of all the unsupported styles.
	 */
	private HashMap unsupportedStyles = new HashMap( );