code: def features(self):
          
          buf = (ctypes.c_char * self.MAX_BUF_SIZE)()
          self._dll.JLINKARM_GetFeatureString(buf)
  
          result = ctypes.string_at(buf).decode().strip()
          if len(result) == 0:
              return list()
  
          return result.split(', ')
docs: Returns a list of the J-Link embedded features.
  
          Args:
            self (JLink): the ``JLink`` instance
  
          Returns:
            A list of strings, each a feature.  Example:
            ``[ 'RDI', 'FlashBP', 'FlashDL', 'JFlash', 'GDB' ]``