code: def speed_info(self):
          
          speed_info = structs.JLinkSpeedInfo()
          self._dll.JLINKARM_GetSpeedInfo(ctypes.byref(speed_info))
          return speed_info
docs: Retrieves information about supported target interface speeds.
  
          Args:
            self (JLink): the ``JLink`` instance
  
          Returns:
            The ``JLinkSpeedInfo`` instance describing the supported target
            interface speeds.