code: func NewRtAttr(attrType int, data []byte) *RtAttr {
  	return &RtAttr{
  		RtAttr: unix.RtAttr{
  			Type: uint16(attrType),
  		},
  		children: []NetlinkRequestData{},
  		Data:     data,
  	}
  }
docs: // Create a new Extended RtAttr object