code: def rfc2426(self):
          
          ret="begin:VCARD\r\n"
          ret+="version:3.0\r\n"
          for _unused, value in self.content.items():
              if value is None:
                  continue
              if type(value) is list:
                  for v in value:
                      ret+=v.rfc2426()
              else:
                  v=value.rfc2426()
                  ret+=v
          return ret+"end:VCARD\r\n"
docs: Get the RFC2426 representation of `self`.
  
          :return: the UTF-8 encoded RFC2426 representation.
          :returntype: `str`