spec := nullTestSpec{"nullstring", "string", [6]nullTestRow{
		{NullString{"aqua", true}, "", NullString{"aqua", true}},
		{NullString{"brown", false}, "", NullString{"", false}},
		{"chartreuse", "", NullString{"chartreuse", true}},
		{NullString{"darkred", true}, "", NullString{"darkred", true}},
		{NullString{"eel", false}, "", NullString{"", false}},
		{"foo", NullString{"black", false}, nil},
	}}

type RawBytes []byte

// NullString represents a string that may be null.
// NullString implements the [Scanner] interface so
// it can be used as a scan destination:
//
//	var s NullString
//	err := db.QueryRow("SELECT name FROM foo WHERE id=?", id).Scan(&s)
//	...
//	if s.Valid {
//	   // use s.String
//	} else {
//	   // NULL value
//	}
type NullString struct {
	String string