getExpireFormat method

String? getExpireFormat()

Get expire ISO format (YYMM)

@return

Implementation

String? getExpireFormat() {
	String year = (expire_year != 0) ? expire_year.toString() : "    ";
	String month = sprintf('%02d', [expire_month ?? "  "]).toString();

	return Helpers.trimValue(year.substring(year.length - 2) + month);
}