code: public List<T> getGeoPackages() {
  		List<T> geoPackages = new ArrayList<>();
  		for (PropertiesCoreExtension<T, ?, ?, ?> properties : propertiesMap
  				.values()) {
  			geoPackages.add(properties.getGeoPackage());
  		}
  		return geoPackages;
  	}
docs: Get the GeoPackages
  
  @return collection of GeoPackages