Fallback to old method

1 files changed, 3 insertions, 1 deletions

diff --git a/config-model-api/src/main/java/com/yahoo/config/model/api/Model.java b/config-model-api/src/main/java/com/yahoo/config/model/api/Model.java
index 068a4ded79d..6481c4cb2c7 100644
--- a/config-model-api/src/main/java/com/yahoo/config/model/api/Model.java
+++ b/config-model-api/src/main/java/com/yahoo/config/model/api/Model.java
@@ -36,7 +36,9 @@ public interface Model {
      * @param configKey the key to resolve
      * @param configDefinition the config definition to use for the schema
      */
-    ConfigInstance.Builder getConfigInstance(ConfigKey<?> configKey, ConfigDefinition configDefinition);
+    default ConfigInstance.Builder getConfigInstance(ConfigKey<?> configKey, ConfigDefinition configDefinition) {
+        return null; // TODO: Remove this default implementation after December 2020
+    }
 
     /** Produces a set of the valid config keys for this model. */
     Set<ConfigKey<?>> allConfigsProduced();