getHint()) { case 'blacklist': return $this->renderLockedHeader($v, 'BLACKLISTED'); case 'recursion': return $this->renderLockedHeader($v, 'RECURSION'); case 'depth_limit': return $this->renderLockedHeader($v, 'DEPTH LIMIT'); case 'array_limit': return $this->renderLockedHeader($v, 'ARRAY LIMIT'); } return null; } }