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Consume

Consume (channels: ChannelWithPeekFlag, continuation: C, persist: Boolean) (m: Match)->

1. Fetch data residing on channels & look for match candidates
2. If match:
   1. return continuation
   2. For all match candidates: if not persist or not peek -> remove from tuplespace
1. not found: store continuation with peek information
2. found:

2.Produce

Produce(channel: C, data: A, persist: Boolean)(m: Match)

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