Allow sinks/sources to have multiple inputs/outputs #1088
Merged
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There was a warning and a comment that having multiple inputs/outputs for one Sink/Source is unintended but should be possible. I think we can remove that "strong recommendation" as it just works.
To not let beginners fall into the trap of having a dangling Sink or Source, like the old warning also might have prevented, inputs and outputs are now explicitly named arguments without a default.