Consider all known runs when checking whether versions are verified

1 files changed, 6 insertions, 0 deletions

diff --git a/vespajlib/src/main/java/com/yahoo/collections/AbstractFilteringList.java b/vespajlib/src/main/java/com/yahoo/collections/AbstractFilteringList.java
index efcdeeaebfc..c64a9ada410 100644
--- a/vespajlib/src/main/java/com/yahoo/collections/AbstractFilteringList.java
+++ b/vespajlib/src/main/java/com/yahoo/collections/AbstractFilteringList.java
@@ -4,6 +4,7 @@ import java.util.Collection;
 import java.util.Comparator;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Optional;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.function.BiFunction;
 import java.util.function.Function;
@@ -50,6 +51,11 @@ public abstract class AbstractFilteringList<Type, ListType extends AbstractFilte
         return constructor.apply(items.subList(negate ? n : 0, negate ? items.size() : n), false);
     }
 
+    /** Returns the first item in this list, or empty if there is none. */
+    public Optional<Type> first() {
+        return items.stream().findFirst();
+    }
+
     /** Returns the subset of items in this which are (not) present in the other list. */
     public ListType in(ListType others) {
         return matching(new HashSet<>(others.asList())::contains);