def nl_send_auto(sk, msg):
nl_complete_msg(sk, msg)<EOL>return nl_send(sk, msg)<EOL>
Finalize and transmit Netlink message.

    https://github.com/thom311/libnl/blob/libnl3_2_25/lib/nl.c#L485

    Finalizes the message by passing it to `nl_complete_msg()` and transmits it by passing it to `nl_send()`.

    This function triggers the `NL_CB_MSG_OUT` callback.

    Positional arguments:
    sk -- Netlink socket (nl_sock class instance).
    msg -- Netlink message (nl_msg class instance).

    Returns:
    Number of bytes sent on success or a negative error code.