Github user ajs6f commented on a diff in the pull request:
https://github.com/apache/jena/pull/337#discussion_r159251828
--- Diff: jena-base/src/main/java/org/apache/jena/atlas/lib/Pair.java ---
@@ -37,6 +40,30 @@
public A car() { return a ; }
public B cdr() { return b ; }
+ public static class OfSameType<T> extends Pair<T, T> {
+
--- End diff --
I'm up for another design, as long as `ViewDatasetGraph` and `PairLock`
stay reasonably clear and concise. A set of `static` methods could work fine
here. I'm not sure what you mean by "even "X extends interface" for the "as
boolean" nature?", can you explain that?
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