Choose ordered sequence of CoreML models

[dokun1]

We need to add a mechanism for adding models in a specific order. Using VNSequenceHandler or something like that, we can pass the observation from one model to another one, and that way, we should be able to handle a chain of events to get a "final" observation.

If we really want to get meta about it, should we be able to choose X number of sequences given loaded models? This is going to require some thought.