code: public Integer getIntegerProperty(String property, boolean required) {
  		Integer integerValue = null;
  		String value = getProperty(property, required);
  		if (value != null) {
  			try {
  				integerValue = Integer.valueOf(value);
  			} catch (NumberFormatException e) {
  				throw new GeoPackageException(GEOPACKAGE_PROPERTIES_FILE
  						+ " property file property '" + property
  						+ "' must be an integer");
  			}
  		}
  		return integerValue;
  	}
docs: Get the Integer property
  
  @param property
  property
  @param required
  required flag
  @return integer property