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duplicate()
is just extend(id)
.
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@ -44,6 +44,9 @@ extension Cofree {
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/// Returns a new `Cofree` constructed by recursively annotating each subtree with itself.
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public var duplicate: Cofree<A, Cofree<A, B>> {
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return .Unroll(self, unwrap.map { $0.duplicate })
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return extend(id)
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}
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}
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import Prelude
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