Svetlana Isakova
12 lines
261 B
Kotlin
12 lines
261 B
Kotlin
package a
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trait Persistent
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trait PersistentFactory<T>
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class Relation<Source: Persistent, Target: Persistent>(
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val sources: PersistentFactory<Source>,
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val targets: PersistentFactory<Target>
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) {
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fun opposite() = Relation(targets, sources)
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}
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