@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 LightGBM model into a ranking expression.

@author lesters
model-integration/src/main/java/ai/vespa/rankingexpression/importer/lightgbm/LightGBMImporter.java