League\CommonMark\Block\Element\BlockQuote::matchesNextLine PHP Method

    public function matchesNextLine(Cursor $cursor)
    {
        if (!$cursor->isIndented() && $cursor->getFirstNonSpaceCharacter() === '>') {
            $cursor->advanceToFirstNonSpace();
            $cursor->advance();
            $cursor->advanceBySpaceOrTab();
            return true;
        }
        return false;
    }