From ec99c240f12313e86f39790af8ca3d5463cd2173 Mon Sep 17 00:00:00 2001
From: Martin Polden <mpolden@mpolden.no>
Date: Fri, 14 Jun 2019 14:44:01 +0200
Subject: Simplify

---
 .../src/main/java/com/yahoo/config/provision/SystemName.java           | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'config-provisioning')

diff --git a/config-provisioning/src/main/java/com/yahoo/config/provision/SystemName.java b/config-provisioning/src/main/java/com/yahoo/config/provision/SystemName.java
index 0f6a87020da..29e48ae0316 100644
--- a/config-provisioning/src/main/java/com/yahoo/config/provision/SystemName.java
+++ b/config-provisioning/src/main/java/com/yahoo/config/provision/SystemName.java
@@ -72,6 +72,7 @@ public enum SystemName {
     public static Set<SystemName> all() { return EnumSet.allOf(SystemName.class); }
 
     public static Set<SystemName> allOf(Predicate<SystemName> predicate) {
-        return Stream.of(values()).filter(predicate::test).collect(Collectors.toSet());
+        return Stream.of(values()).filter(predicate).collect(Collectors.toUnmodifiableSet());
     }
+
 }
-- 
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