Created a custom object, and I think I could utilize DataFormat to wrap around that custom object and use clipboard the way OSGI uses dragboard. In my kotlin class, Dataformat is highlight red and says "DataFormat does not have a companion object, and thus must be initialized here". I don't know too much about companion objects, since there isn't a lot of documentation on the topic (other than for use in css classes). How can I assign it as a companion object?