code: def licenses(self):
          
          buf_size = self.MAX_BUF_SIZE
          buf = (ctypes.c_char * buf_size)()
          res = self._dll.JLINK_GetAvailableLicense(buf, buf_size)
          if res < 0:
              raise errors.JLinkException(res)
          return ctypes.string_at(buf).decode()
docs: Returns a string of the built-in licenses the J-Link has.
  
          Args:
            self (JLink): the ``JLink`` instance
  
          Returns:
            String of the contents of the built-in licenses the J-Link has.