private void registerFileEntries(Collection<ConfigPayloadBuilder> builders, Map<Path, FileReference> registeredFiles, boolean isModelType) {
        for (ConfigPayloadBuilder builder : builders) {
            registerFileEntry(builder, registeredFiles, isModelType);
        }
    }
Registers user configured files for a producer for file distribution.
config-model/src/main/java/com/yahoo/vespa/model/filedistribution/UserConfiguredFiles.java