vendor/maximebf/debugbar/src/DebugBar/DataFormatter/VarDumper/DebugBarHtmlDumper.php

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<?php

namespace DebugBar\DataFormatter\VarDumper;

use Symfony\Component\VarDumper\Dumper\HtmlDumper;

/**
 * We have to extend the base HtmlDumper class in order to get access to the protected-only
 * getDumpHeader function.
 */
class DebugBarHtmlDumper extends HtmlDumper
{
    /**
     * Resets an HTML header.
     */
    public function resetDumpHeader()
    {
        $this->dumpHeader = null;
    }

    public function getDumpHeaderByDebugBar() {
        // getDumpHeader is protected:
        return str_replace('pre.sf-dump', '.phpdebugbar pre.sf-dump', $this->getDumpHeader());
    }
}