public function start()
{
if (isset($_GET['_debugger']) && preg_match('#^[a-zA-Z0-9_/]+\\.html$#', $_GET['_debugger'])) {
$file = '@data/debugger' . $_GET['_debugger'];
if ($this->filesystem->fileExists($file)) {
exit($this->filesystem->fileGet($file));
}
}
$handler = [$this, '_eventHandlerPeek'];
$this->eventsManager->peekEvents($handler);
return $this;
}