code: def fromBban(bban):
          
          countryCode = "XE"
  
          remainder = mod9710(iso13616Prepare(countryCode + "00" + bban))
          checkDigit = ("0" + str(98 - remainder))[-2:]
  
          return Iban(countryCode + checkDigit + bban)
docs: Convert the passed BBAN to an IBAN for this country specification.
          Please note that <i>"generation of the IBAN shall be the exclusive
          responsibility of the bank/branch servicing the account"</i>.
          This method implements the preferred algorithm described in
          http://en.wikipedia.org/wiki/International_Bank_Account_Number#Generating_IBAN_check_digits
  
          @method fromBban
          @param {String} bban the BBAN to convert to IBAN
          @returns {Iban} the IBAN object