// err is a persistent error.
	// It is only the responsibility of every exported method of Writer to
	// ensure that this error is sticky.
	err error
}

// NewWriter creates a new Writer writing to w.
func NewWriter(w io.Writer) *Writer {
	return &Writer{w: w, curr: &regFileWriter{w, 0}}
}

type fileWriter interface {
	io.Writer
	fileState

	ReadFrom(io.Reader) (int64, error)
}

	testHookCloseSizeOffset func(size, offset uint64)
}

type header struct {
	*FileHeader
	offset uint64
	raw    bool
}

// NewWriter returns a new [Writer] writing a zip file to w.
func NewWriter(w io.Writer) *Writer {
	return &Writer{cw: &countWriter{w: bufio.NewWriter(w)}}
}

// SetOffset sets the offset of the beginning of the zip data within the