Just use Streams.toList as that is unmdifiable.

1 files changed, 1 insertions, 1 deletions

diff --git a/routing-generator/src/main/java/com/yahoo/vespa/hosted/routing/RoutingTable.java b/routing-generator/src/main/java/com/yahoo/vespa/hosted/routing/RoutingTable.java
index de3207fda2e..7f9f04ed691 100644
--- a/routing-generator/src/main/java/com/yahoo/vespa/hosted/routing/RoutingTable.java
+++ b/routing-generator/src/main/java/com/yahoo/vespa/hosted/routing/RoutingTable.java
@@ -154,7 +154,7 @@ public class RoutingTable {
             this.instance = Objects.requireNonNull(instance);
             this.zone = Objects.requireNonNull(zone);
             this.cluster = Objects.requireNonNull(cluster);
-            this.reals = Objects.requireNonNull(reals).stream().sorted().collect(Collectors.toUnmodifiableList());
+            this.reals = Objects.requireNonNull(reals).stream().sorted().toList();
             for (int i = 0; i < reals.size(); i++) {
                 for (int j = 0; j < i; j++) {
                     if (reals.get(i).equals(reals.get(j))) {