helper_method_doctype.go
func (e *helperMethodDoctype) WriteTo(w io.Writer) (int64, error) {
	i, err := w.Write([]byte(doctypes[e.doctype]))
	return int64(i), err
}
func (e *helperMethodDoctype) WriteTo(w io.Writer) (int64, error) {
	i, err := w.Write([]byte(doctypes[e.doctype]))
	return int64(i), err
}
// WriteTo writes data to w.