def get_device_spec(vnic, set_connected):
        """
        this function creates the device change spec,
        :param vnic: vnic
        :param set_connected: bool, set as connected or not, default: True
        :rtype: device_spec
        """
        nic_spec = VNicService.create_vnic_spec(vnic)
        VNicService.set_vnic_connectivity_status(nic_spec, to_connect=set_connected)
        return nic_spec
this function creates the device change spec,
        :param vnic: vnic
        :param set_connected: bool, set as connected or not, default: True
        :rtype: device_spec