Bug 120317 Set "dimension" property to 3D in "properties" view, error appears in layout editor.
Description: Set "dimension" property to 3D in "properties" view, error appears in layout editor. Steps to reproduce: 1. Add a 2D chart in property editor. 2. Set its dimension property to "three-dimension" in properties view. 3. Error appears in chart.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/extension/PeerExtensibilityProvider.java
return Collections.EMPTY_LIST;
	}
	/**
	 * Returns the value of extension property or extension model property.
	 * 
	 * @param propName
	 *            name of the property
	 * @return the value of the given property. If the property is not found, or
	 *         the value is not set, return null.
	 */
	public Object getExtensionProperty( String propName )
	{
		if ( isExtensionXMLProperty( propName ) )
		{
			if ( reportItem != null )
			{
				ByteArrayOutputStream stream = reportItem.serialize( propName );
				if ( stream == null )
					return null;
				String retValue = null;
				try
				{
					retValue = stream.toString( UnicodeUtil.SIGNATURE_UTF_8 );
				}
				catch ( UnsupportedEncodingException e )
				{
					assert false;
				}
				return retValue;
			}