code: public int deleteValue(String property, String value) {
  		int count = 0;
  		for (String geoPackage : propertiesMap.keySet()) {
  			if (deleteValue(geoPackage, property, value)) {
  				count++;
  			}
  		}
  		return count;
  	}
docs: Delete the property value from all GeoPackages
  
  @param property
  property name
  @param value
  property value
  @return number of GeoPackages deleted from