NoDomainPart example

        return new ValidEmail();
    }

    private function checkEmptyDomain(): Result
    {
        $thereIsNoDomain = $this->lexer->current->isA(EmailLexer::S_EMPTY) ||
            ($this->lexer->current->isA(EmailLexer::S_SP) &&
                !$this->lexer->isNextToken(EmailLexer::GENERIC));

        if ($thereIsNoDomain) {
            return new InvalidEmail(new NoDomainPart(), $this->lexer->current->value);
        }

        return new ValidEmail();
    }

    private function checkInvalidTokensAfterAT(): Result
    {
        if ($this->lexer->current->isA(EmailLexer::S_DOT)) {
            return new InvalidEmail(new DotAtStart(), $this->lexer->current->value);
        }
        if ($this->lexer->current->isA(EmailLexer::S_HYPHEN)) {