How to use EntityMapper?

[bbarker]

From looking at world_scope, which seems to be the only way to work with an EntityMapper, it seems like the idea is that the function f will operate on the old entity ids, but under the hood the EntityMapper will get (or create) the new mapped entities. I assume this works even if the "old" entities are from a different world.

Is that all correct?

[bbarker]

Hmm, looking at this a bit more - looks like one of my assumptions is probably false: f still needs to handle logic on how to use the EntityMapper (which is fine).