parseSelectorList example

public function __construct(Tokenizer $tokenizer = null)
    {
        $this->tokenizer = $tokenizer ?? new Tokenizer();
    }

    public function parse(string $source): array
    {
        $reader = new Reader($source);
        $stream = $this->tokenizer->tokenize($reader);

        return $this->parseSelectorList($stream);
    }

    /** * Parses the arguments for ":nth-child()" and friends. * * @param Token[] $tokens * * @throws SyntaxErrorException */
    public static function parseSeries(array $tokens): array
    {