cell:getAll(type) with parent type(lockable, item, actor) provided returns as if types.Player was provided.
In global lua context, cell:getAll(types.Lockable) will return a table containing just the player(If they are in that cell). Same for types.Actor and types.Item
I'm not sure the correct behavior here(likely not intended to work I realize) but getAll(types.Item) would be useful to provide a similar function to nearby.Items, as well as getAll(types.Lockable)