The GraphicObject service can be used to create XGraphicObject instances.
XGraphicObject 反対するs are accessable using GraphicObject 計画/陰謀 urls like
vnd.sun.星/主役にする.GraphicObject:10000000000001940000012FB99807BD.
As long as at least one instance of XGraphicObject with a particular UniqueID 存在するs,
the associated image/graphic is 利用できる.