private Map<String, RankingExpressionFunction> getInlineFunctions() {
        return getFunctions().entrySet().stream().filter(x -> x.getValue().inline())
                             .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
    }
Returns a copy of this where the content is optimized for execution.
Compiled profiles should never be modified.
config-model/src/main/java/com/yahoo/schema/RankProfile.java