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: proc_event_linux.go
    path of file: ./repos/faasd/vendor/github.com/vishvananda/netlink
    
    the code of the file until where you have to start completion: package netlink

import (
	"bytes"
	"encoding/binary"
	"fmt"
	"os"
	"syscall"

	"github.com/vishvananda/netlink/nl"
	"github.com/vishvananda/netns"
	"golang.org/x/sys/unix"
)

const CN_IDX_PROC = 0x1

const (
	PROC_EVENT_NONE     = 0x00000000
	PROC_EVENT_FORK     = 0x00000001
	PROC_EVENT_EXEC     = 0x00000002
	PROC_EVENT_UID      = 0x00000004
	PROC_EVENT_GID      = 0x00000040
	PROC_EVENT_SID      = 0x00000080
	PROC_EVENT_PTRACE   = 0x00000100
	PROC_EVENT_COMM     = 0x00000200
	PROC_EVENT_COREDUMP = 0x40000000
	PROC_EVENT_EXIT     = 0x80000000
)

const (
	CN_VAL_PROC          = 0x1
	PROC_CN_MCAST_LISTEN = 0x1
)

type ProcEventMsg interface {
	Pid() uint32
	Tgid() uint32
}

type ProcEventHeader struct {
	What      uint32
	CPU       uint32
	Timestamp uint64
}

type ProcEvent struct {
	ProcEventHeader
	Msg ProcEventMsg
}

func (pe *ProcEvent) set
    
func parseNetlinkMessage(m syscall.NetlinkMessage) *ProcEvent {
	if m.Header.Type == unix.NLMSG_DONE {
		buf := bytes.NewBuffer(m.Data)
		msg := &nl.CnMsg{}
		hdr := &ProcEventHeader{}
		binary.Read(buf, nl.NativeEndian(), msg)
		binary.Read(buf, nl.NativeEndian(), hdr)

		pe := &ProcEvent{}
		pe.setHeader(*hdr)
		switch hdr.What {
		case PROC_EVENT_EXIT:
			event := &ExitProcEvent{}
			binary.Read(buf, nl.NativeEndian(), event)
			pe.Msg = event
			return pe
		case PROC_EVENT_FORK:
			event := &ForkProcEvent{}
			binary.Read(buf, nl.NativeEndian(), event)
			pe.Msg = event
			return pe
		case PROC_EVENT_EXEC:
			event := &ExecProcEvent{}
			binary.Read(buf, nl.NativeEndian(), event)
			pe.Msg = event
			return pe
		case PROC_EVENT_COMM:
			event := &CommProcEvent{}
			binary.Read(buf, nl.NativeEndian(), event)
			pe.Msg = event
			return pe
		}
		return nil
	}

	return nil
}