generics in Go codegraph

[reid41]

Generics in Go, so far cannot make a associate with below situation:

src/cmd/trace/gstate.go

type gState[R resource] struct {
	baseName  string
	named     bool   // Whether baseName has been set.
	label     string // EventLabel extension.
	isSystemG bool

	executing R // The resource this goroutine is executing on. (Could be itself.)
.....
}


func (gs *gState[R]) setStartCause(ts trace.Time, name string, resource uint64, stack trace.Stack) {
	gs.startCause.time = ts
	gs.startCause.name = name
	gs.startCause.resource = resource
	gs.startCause.stack = stack
}

// created indicates that this goroutine was just created by the provided creator.
func (gs *gState[R]) created(ts trace.Time, creator R, stack trace.Stack) {
	if creator == R(noResource) {
		return
	}
	gs.setStartCause(ts, "go", uint64(creator), stack)
}

// start indicates that a goroutine has started running on a proc.
func (gs *gState[R]) start(ts trace.Time, resource R, ctx *traceContext) {
	// Set the time for all the active ranges.
	for name := range gs.activeRanges {
		gs.activeRanges[name] = activeRange{ts, trace.NoStack}
	}

	if gs.startCause.name != "" {
		// It has a start cause. Emit a flow event.
		ctx.Arrow(traceviewer.ArrowEvent{
			Name:         gs.startCause.name,
			Start:        ctx.elapsed(gs.startCause.time),
			End:          ctx.elapsed(ts),
			FromResource: uint64(gs.startCause.resource),
			ToResource:   uint64(resource),
			FromStack:    ctx.Stack(viewerFrames(gs.startCause.stack)),
		})
		gs.startCause.time = 0
		gs.startCause.name = ""
		gs.startCause.resource = 0
		gs.startCause.stack = trace.NoStack
	}
	gs.executing = resource
	gs.startRunningTime = ts
}