models/classes/runner/StorageManager.php
public function has($userId, $callId)
    {
        $key = $this->getCacheKey($userId, $callId);
        if (!isset($this->cache[$key])) {
            return $this->getStorage()->has($userId, $callId);
        }
        return $this->exists($key);
    }
public function has($userId, $callId)
    {
        $key = $this->getCacheKey($userId, $callId);
        if (!isset($this->cache[$key])) {
            return $this->getStorage()->has($userId, $callId);
        }
        return $this->exists($key);
    }
Whenever or not a dataset exists.

@param string $userId
@param string $callId
@return boolean