code: public List<T> hasValue(String property, String value) {
  		List<T> geoPackages = new ArrayList<>();
  		for (PropertiesCoreExtension<T, ?, ?, ?> properties : propertiesMap
  				.values()) {
  			if (properties.hasValue(property, value)) {
  				geoPackages.add(properties.getGeoPackage());
  			}
  		}
  		return geoPackages;
  	}
docs: Get the GeoPackages with the property name and value
  
  @param property
  property name
  @param value
  property value
  @return GeoPackages