private static FileAcquirer createFileAcquirer(MockFileRegistry fileRegistry, File appDir) {
        Map<String, File> fileMap = new HashMap<>();
        for (FileRegistry.Entry entry : fileRegistry.export()) {
            fileMap.put(entry.reference.value(), relativePath(appDir, entry.reference.value()));
        }
        return MockFileAcquirer.returnFiles(fileMap);
    }
Create a ModelsEvaluator from the models found in the modelsPath. Does
not need to be in a application package.

@param modelsPath Path to a directory containing models to import
@return a ModelsEvaluator containing the imported models
config-model/src/main/java/com/yahoo/vespa/model/container/ml/ModelsEvaluatorTester.java