Zendesk\API\Resources\Core\Macros::apply PHP Method

    public function apply($id)
    {
        if (empty($id)) {
            $id = $this->getChainedParameter(get_class($this));
        }
        if (empty($id)) {
            throw new MissingParametersException(__METHOD__, ['id']);
        }
        return $this->client->get($this->getRoute(__FUNCTION__, ['id' => $id]));
    }