Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/css/CssStyleSheetHandle.java
* @return the style handle with the given name in the style sheet,
	 *         otherwise <code>null</code>
	 */
	public SharedStyleHandle findStyle( String name )
	{
		StyleElement style = styleSheet.findStyle( name );
		if ( style == null )
			return null;
		return (SharedStyleHandle) style.getHandle( getModule( ) );
	}
	/**
	 * Returns all the unsupported style names.
	 * 
	 * @return the list of the unsupported style name
	 */
	public List getUnsupportedStyles( )
	{
		return styleSheet.getUnsupportedStyle( );
	}
	/**
	 * Gets the warning list of the given style. Each one in the list is
	 * instance of <code>StyleSheetParserException</code>.
	 * 
	 * @param styleName
	 *            the style name
	 * @return the warning list of the given style, otherwise null
	 * @see org.eclipse.birt.report.model.api.css.StyleSheetParserException
	 */
	public List getWarnings( String styleName )
	{