gets the value of the serialnumber property . concode_field_sep String issuerId concode_elem_sep String serialNumber concode_elem_sep long serialVersionUID concode_elem_sep String couponPin concode_field_sep void setSerialNumber concode_elem_sep String getIssuerId concode_elem_sep String getCouponPin concode_elem_sep void setCouponPin concode_elem_sep void setIssuerId
String function ( ) { return serialNumber ; }