docs: def nlmsg_find_attr(nlh, hdrlen, attrtype):
      """Find a specific attribute in a Netlink message.
  
      https://github.com/thom311/libnl/blob/libnl3_2_25/lib/msg.c#L231
  
      Positional arguments:
      nlh -- Netlink message header (nlmsghdr class instance).
      hdrlen -- length of family specific header (integer).
      attrtype -- type of attribute to look for (integer).
  
      Returns:
      The first attribute which matches the specified type (nlattr class instance).
      """
      return nla_find(nlmsg_attrdata(nlh, hdrlen), nlmsg_attrlen(nlh, hdrlen), attrtype)