func newLocalListenerMPTCP(t *testing.T, envVar bool) Listener { … } func postAcceptMPTCP(ls *localServer, ch chan<- error) { … } func dialerMPTCP(t *testing.T, addr string, envVar bool) { … } func canCreateMPTCPSocket() bool { … } func testMultiPathTCP(t *testing.T, envVar bool) { … } func TestMultiPathTCP(t *testing.T) { … }