def nlmsg_tail(nlh):
return bytearray_ptr(nlh.bytearray, NLMSG_ALIGN(nlh.nlmsg_len))<EOL>
https://github.com/thom311/libnl/blob/libnl3_2_25/lib/msg.c#L110.

    Positional arguments:
    nlh -- nlmsghdr class instance.

    Returns:
    bytearray_ptr instance after the last nla in the nlmsghdr.