code: public boolean deleteAll(String geoPackage) {
  		boolean deleted = false;
  		PropertiesCoreExtension<T, ?, ?, ?> properties = propertiesMap
  				.get(geoPackage);
  		if (properties != null) {
  			deleted = properties.deleteAll() > 0;
  		}
  		return deleted;
  	}
docs: Delete all properties and values from a specified GeoPackage
  
  @param geoPackage
  GeoPackage name
  @return true if any deleted