public function ofLead($leadId)
    {
        $response = giga_facebook_get($leadId . '/custom_labels');

        if (!isset($response->data) || !is_array($response->data)) {
            return false;
        }

        $channels = $response->data;

        $channelIds = [];
        foreach ($channels as $channel) {
            $channelIds[] = $channel->id;
        }

        return $channelIds;
    }