// writeParallel handles scheduling parallel execution of data write functions.
func writeParallel(wg *sync.WaitGroup, fn writeFn, ctxt *Link, seek, vaddr, length uint64) {
	if out, err := ctxt.Out.View(seek); err != nil {
		ctxt.Out.SeekSet(int64(seek))
		fn(ctxt, ctxt.Out, int64(vaddr), int64(length))
	} else {
		wg.Add(1)
		go func() {
			defer wg.Done()
			fn(ctxt, out, int64(vaddr), int64(length))

// seat : 2014-05-22 SEAT, S.A. (Sociedad Unipersonal)
seat

// secure : 2015-08-27 Amazon Registry Services, Inc.
secure

// security : 2015-05-14 XYZ.COM LLC
security

// seek : 2014-12-04 Seek Limited
seek

// select : 2015-10-08 Registry Services, LLC
select

// sener : 2014-10-24 Sener Ingeniería y Sistemas, S.A.
sener

// services : 2014-02-27 Binky Moon, LLC
services

		if _, err := io.CopyN(f, rand.Reader, nBytes); err != nil {
			return nil, nil, fmt.Errorf("failed to write data to file: %v", err)
		}
		if _, err := f.Seek(0, 0); err != nil {
			return nil, nil, fmt.Errorf("failed to seek to front: %v", err)
		}

		done = func() {
			f.Close()
			os.Remove(f.Name())
		}

		return f, done, nil
	}