You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: socket_linux.go
    path of file: ./repos/gccrs/libgo/go/syscall
    
    the code of the file until where you have to start completion: // socket_linux.go -- Socket handling specific to GNU/Linux.

// Copyright 2010 The Go Authors. All rights reserved.
// Use o
    
func (sa *SockaddrNetlink) sockaddr() (*RawSockaddrAny, Socklen_t, error) {
	sa.raw.Family = AF_NETLINK
	sa.raw.Pad = sa.Pad
	sa.raw.Pid = sa.Pid
	sa.raw.Groups = sa.Groups
	return (*RawSockaddrAny)(unsafe.Pointer(&sa.raw)), SizeofSockaddrNetlink, nil
}