const golang.org/x/sys/unix.SizeofIPv6MTUInfo

2 uses

	golang.org/x/sys/unix (current package)
		syscall_unix.go#L270: 	vallen := _Socklen(SizeofIPv6MTUInfo)
		ztypes_darwin_arm64.go#L272: 	SizeofIPv6MTUInfo      = 0x20