prefix   []string
	}{
		{"heap", []string{"runtime/pprof.allocDeep"}},
		{"block", []string{"runtime.chanrecv1", "runtime/pprof.blockChanDeep"}},
		{"mutex", []string{"sync.(*Mutex).Unlock", "runtime/pprof.blockMutexDeep"}},
		{"goroutine", []string{"runtime.gopark", "runtime.chanrecv", "runtime.chanrecv1", "runtime/pprof.goroutineDeep"}},
	}

	for _, test := range tests {
		t.Run(test.profiler, func(t *testing.T) {

	TRESULTS // multiple types; the result of calling a function or method, with a memory at the end.

	NTYPE
)

// ChanDir is whether a channel can send, receive, or both.
type ChanDir uint8

func (c ChanDir) CanRecv() bool { return c&Crecv != 0 }
func (c ChanDir) CanSend() bool { return c&Csend != 0 }

const (
	// types of channel
	// must match ../../../../reflect/type.go:/ChanDir
	Crecv ChanDir = 1 << 0
	Csend ChanDir = 1 << 1