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dumpKey example

    public function setDisplayOptions(array $displayOptions)
    {
        $this->displayOptions = $displayOptions + $this->displayOptions;
    }

    /** * @return void */
    public function dumpScalar(Cursor $cursor, string $type, string|int|float|bool|null $value)
    {
        $this->dumpKey($cursor);
        $this->collapseNextHash = $this->expandNextHash = false;

        $style = 'const';
        $attr = $cursor->attr;

        switch ($type) {
            case 'default':
                $style = 'default';
                break;

            case 'label':

$line .= 'pre.sf-dump .sf-dump-ellipsis-note{'.$this->styles['note'].'}';

        return $this->dumpHeader = preg_replace('/\s+/', ' ', $line).'</style>'.$this->dumpHeader;
    }

    /** * @return void */
    public function dumpString(Cursor $cursor, string $str, bool $bin, int $cut)
    {
        if ('' === $str && isset($cursor->attr['img-data'], $cursor->attr['content-type'])) {
            $this->dumpKey($cursor);
            $this->line .= $this->style('default', $cursor->attr['img-size'] ?? '', []);
            $this->line .= $cursor->depth >= $this->displayOptions['maxDepth'] ? ' <samp class=sf-dump-compact>' : ' <samp class=sf-dump-expanded>';
            $this->endValue($cursor);
            $this->line .= $this->indentPad;
            $this->line .= sprintf('<img src="data:%s;base64,%s" /></samp>', $cursor->attr['content-type'], base64_encode($cursor->attr['img-data']));
            $this->endValue($cursor);
        } else {
            parent::dumpString($cursor, $str, $bin, $cut);
        }
    }