docs: def nlmsg_alloc_simple(nlmsgtype, flags):
      """Allocate a new Netlink message.
  
      https://github.com/thom311/libnl/blob/libnl3_2_25/lib/msg.c#L346
  
      Positional arguments:
      nlmsgtype -- Netlink message type (integer).
      flags -- message flags (integer).
  
      Returns:
      Newly allocated Netlink message (nl_msg class instance) or None.
      """
      nlh = libnl.linux_private.netlink.nlmsghdr(nlmsg_type=nlmsgtype, nlmsg_flags=flags)
      msg = nlmsg_inherit(nlh)
      _LOGGER.debug('msg 0x%x: Allocated new simple message', id(msg))
      return msg