public function fetch() {
        $params = Values::of(array());

        $payload = $this->version->fetch(
            'GET',
            $this->uri,
            $params
        );

        return new StepInstance(
            $this->version,
            $payload,
            $this->solution['flowSid'],
            $this->solution['engagementSid'],
            $this->solution['sid']
        );
    }