Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ReportDesignHandle.java
*/
	public void setThumbnail( byte[] data ) throws SemanticException
	{
		try
		{
			setStringProperty( THUMBNAIL_PROP, new String( data, CHARSET ) );
		}
		catch ( UnsupportedEncodingException e )
		{
			assert false;
		}
	}
	/**
	 * Gets the thumbnail image encoded in ISO-8859-1.
	 * 
	 * @return the thumbnail image
	 */
	public byte[] getThumbnail( )
	{
		return ( (ReportDesign) module ).getThumbnail( );
	}
	/**
	 * Deletes the thumbnail image in the design.
	 * 
	 * @throws SemanticException
	 *             if the property is locked or not defined on this design.
	 */
	public void deleteThumbnail( ) throws SemanticException
	{
		clearProperty( THUMBNAIL_PROP );