gets the value of the cardnum property . concode_field_sep SignatureData signatureData concode_elem_sep String cardNum concode_elem_sep String cardType concode_elem_sep String cardIndexNum concode_field_sep String getCardIndexNum concode_elem_sep void setCardIndexNum concode_elem_sep void setCardNum concode_elem_sep void setCardType concode_elem_sep void setSignatureData concode_elem_sep String getCardType concode_elem_sep SignatureData getSignatureData
String function ( ) { return cardNum ; }