src/Synchronization/Manager.php
public function continueSync($token): Result
    {
        if ($token instanceof Result) {
            if (!$this->isDeliveryApi && $token->isDone()) {
                throw new \RuntimeException('Can not continue syncing when using the Content Preview API.');
            }

            $token = $token->getToken();
        }

        $response = $this->client->syncRequest(['sync_token' => $token]);

        return $this->buildResult($response);
    }
public function continueSync($token): Result
    {
        if ($token instanceof Result) {
            if (!$this->isDeliveryApi && $token->isDone()) {
                throw new \RuntimeException('Can not continue syncing when using the Content Preview API.');
            }

            $token = $token->getToken();
        }

        $response = $this->client->syncRequest(['sync_token' => $token]);

        return $this->buildResult($response);
    }
Continues the synchronization either at the next page,
or with the results since the initial synchronization.

@param string|Result $token

@throws \RuntimeException if this method is used for a subsequent sync when used with the Preview API

@return Result