geopackage-sdk/src/main/java/mil/nga/geopackage/extension/RTreeIndexTableDao.java
public Extensions create() {
        Extensions extension = null;
        if (!has()) {
            extension = rTree.create(featureDao.getTable());
            if (progress != null) {
                progress.addProgress(count());
            }
        }
        return extension;
    }
public Extensions create() {
        Extensions extension = null;
        if (!has()) {
            extension = rTree.create(featureDao.getTable());
            if (progress != null) {
                progress.addProgress(count());
            }
        }
        return extension;
    }
Create the RTree extension for the feature table

@return extension