This is a first step towards the goal to introduce a ''parameter tuple'' into the `FeedManifold`.
Doing so invalidates some of the previously taken decisions regarding the `FeedManifold`;
at that time I was still under the impression of the old design from 2012, which called for a ''Buffer Table''.
Now we are forced to allow for more leeway in the function definition; even more so, since the limitation
to one single input and output Buffer type can be deemed unrealistic anyway.
So why sticking to an array at all? ''Buffers could also be a tuple...''
Seemingly another reason why I used an array was the idea to somehow limit the number of template instances,
by grouping them into a few number of array sizes, like 1,2,5 and 10.
This idea falls short, since in reality it can not be avoided to have the processing function on the type signature anyway.
Thus, the only point where the number of templates could be limited lies in the library plug-in,
where this »processing function« is actually defined as an adapter.