Niklas Haas authored
Not implemented for the other types of objects, because the chances of a user needing to associate unique data for objects is much less likely. It helps for buf/tex in particular since the user can use this to e.g. hold extra state that needs to be tracked for synchronization / external API usage. It's also motivated by the `pl_tex_dummy_create`, which can benefit from allowing users to attach their own objects to dummy textures so they know which one corresponds to what.