(self)
Return a list of GattService objects that have been discovered for
        this device.
Return a list of GattService objects that have been discovered for
        this device.
Return a list of GattService objects that have been discovered for this device .
def list_services(self):
        """Return a list of GattService objects that have been discovered for
        this device.
        """
        raise NotImplementedError
def list_services ( self ) : raise NotImplementedError