Question Spawning a list of prefabs with a system

Not sure how much sense that subject makes, but I'm having trouble wording it.

I have a set of prefabs - motes of light in different colours, each with a different behaviour. I want to spawn in a certain number of each one, as entities so that I can take advantage of all of the ECS speed and efficiency goodness.

I have two options for doing this that I can see:
1/ Have my array of prefabs in the Spawner component
2/ Have my array of prefabs in my Config (which is a garden-variety MonoBehavior)

Making arrays in components seems to be horrendously complicated, and I've yet to find an article on it that makes enough sense to me that I feel I could turn around and use it.

Pulling in GameObjects from a MonoBehavior script runs up against the problem of needing to convert them to entities. The only stuff I've been able to find online about doing this uses the now-deprecated method of attaching the ConvertToEntity script to the prefab.

Can anybody help me either figure out how to put an array into a component (in a way that I can expose it to the Unity editor in my Authoring script so I can drag-and-drop the prefabs into it) or alternatively how to convert the GameObject prefabs into Entities?

 

Code (CSharp):

1. public struct Spawnable : IBufferElementData
2. {
3.     public Entity prefab;
4. }
5.  
6. public class SpawnerAuthoring : MonoBehaviour
7. {
8.     public GameObject[] prefabs;
9. }
10.  
11. public class SpawnerBaker : Baker<SpawnerAuthoring>
12. {
13.     public override void Bake(SpawnerAuthoring authoring)
14.     {
15.         if (authoring.prefabs == null || authoring.prefabs.Length == 0)
16.             return;
17.  
18.         var buffer = AddBuffer<Spawnable>().Reinterpret<Entity>();
19.         foreach (var prefab in authoring.prefabs)
20.             buffer.Add(GetEntity(prefab));
21.     }
22. }