Github user jfrazee commented on a diff in the pull request: https://github.com/apache/nifi/pull/1833#discussion_r117601695 --- Diff: nifi-nar-bundles/nifi-standard-services/nifi-lookup-services-bundle/nifi-lookup-services/src/main/java/org/apache/nifi/lookup/SimpleKeyValueLookupService.java --- @@ -52,7 +57,21 @@ public void cacheConfiguredValues(final ConfigurationContext context) { } @Override - public Optional<String> lookup(final String key) { + public Optional<String> lookup(final Map<String, String> coordinates) { + if (coordinates == null) { + return null; --- End diff -- Should these nulls be Optional.empty()?
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