func Raw(n *ast.Node) (string, error) {
	return unquoteValues(n.Values, unquoteRaw)
}
Raw returns the raw value of the string node, with string escapes left in place.
Calling UnquoteRaw on non-string node doesn't panic, but is otherwise undefined.
package unquote
import (
	"errors"
	"fmt"
	"strconv"
	"strings"
	"unicode/utf8"
	"github.com/protocolbuffers/txtpbfmt/ast"
)
func Unquote(n *ast.Node) (string, error) {
	return unquoteValues(n.Values, unquote)
}