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Merge pull request #532 from leogtzr/master

Adding initialization-on-demand idiom and noninstantiable class instead of interface constant idiom
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Ilkka Seppälä committed
9ec0935a1cd666fa587d21a5bc72372da75d23ca
Committed by GitHub <noreply@github.com> on 1/23/2017, 6:21:07 AM