public function getChatEmoticonSets($emotesets = null)
    {
        if ($emotesets && !is_string($emotesets)) {
            throw new InvalidTypeException('emotesets', 'string', gettype($emotesets));
        }

        $emotesets = trim($emotesets, ', ');

        return $this->get('chat/emoticon_images', ['emotesets' => $emotesets]);
    }