private Map<String, String> bind(List<String> formalArguments,
                                     Arguments invocationArguments) {
        Map<String, String> bindings = new HashMap<>(formalArguments.size());
        for (int i = 0; i < formalArguments.size(); i++) {
            String identifier = invocationArguments.expressions().get(i).toString();
            bindings.put(formalArguments.get(i), identifier);
        }
        return bindings;
    }
Binds the given list of formal arguments to their actual values
config-model/src/main/java/com/yahoo/schema/MapEvaluationTypeContext.java