private function isTheIdentifierILookingFor(Query\Lexer $lexer)
    {
        if ($lexer->token['type'] === Query\Lexer::T_IDENTIFIER && $lexer->isNextToken(Query\Lexer::T_IDENTIFIER)) {
            return true;
        }

        if ($lexer->token['type'] === Query\Lexer::T_IDENTIFIER && $lexer->isNextToken(Query\Lexer::T_AS)) {

            $lexer->moveNext();

            if ($lexer->lookahead['type'] === Query\Lexer::T_IDENTIFIER) {
                return true;
            }
        }

        return false;
    }