public VALUE get(CompoundName key, Map<String, String> context) {
        DimensionalValue<VALUE> variants = values.get(key);
        if (variants == null) return null;
        return variants.get(context);
    }
Returns the value for this key matching a context, or null if none
container-search/src/main/java/com/yahoo/search/query/profile/compiled/DimensionalMap.java