Felix Lange a13e920af0 trie: clean up iterator constructors
Make it so each iterator has exactly one public constructor:

- NodeIterators can be created through a method.
- Iterators can be created through NewIterator on any NodeIterator.
2017-04-25 02:14:31 +02:00
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2017-04-25 02:14:31 +02:00
2017-01-06 15:52:03 +01:00
2017-01-06 14:15:22 +01:00