docs: public Object execute(final Object value, final CsvContext context) {
  		validateInputNotNull(value, context);
  		
  		if( !possibleValues.contains(value) ) {
  			throw new SuperCsvConstraintViolationException(String.format(
  				"'%s' is not included in the allowed set of values", value), context, this);
  		}
  		
  		return next.execute(value, context);
  	}