func internal/runtime/gc/scan.ScanSpanPackedGo

one use

	internal/runtime/gc/scan (current package)
		scan_go.go#L15: func ScanSpanPackedGo(mem unsafe.Pointer, bufp *uintptr, objMarks *gc.ObjMask, sizeClass uintptr, ptrMask *gc.PtrMask) (count int32) {