public FunctionEvaluator evaluatorOf(String modelName, String ... names) {
        return requireModel(modelName).evaluatorOf(names);
    }
Returns a function which can be used to evaluate the given function in the given model

@param modelName the name of the model
@param names the 0-2 name components identifying the output to compute
@throws IllegalArgumentException if the function or model is not present
model-evaluation/src/main/java/ai/vespa/models/evaluation/ModelsEvaluator.java