@Override
    public boolean canImport(String modelPath) {
        File modelFile = new File(modelPath);
        if ( ! modelFile.isFile()) return false;

        return modelFile.toString().endsWith(".json") && probe(modelFile);
    }
Converts a saved XGBoost model into a ranking expression.

@author grace-lam
@author bratseth
model-integration/src/main/java/ai/vespa/rankingexpression/importer/xgboost/XGBoostImporter.java