code: protected function loadFromCache()
      {
          $key = $this->calculateCacheKey();
          if (!$this->container->getCache()->contains($key)) {
              return false;
          }
  
          // Perform loading now.
          $data = json_decode($this->container->getCache()->fetch($key), true);
  
          if (empty($data)) {
              return false;
          }
  
          $this->information = $data['information'];
          $this->tableMap    = $data['tableMap'];
          $this->parentMap   = $data['parentMap'];
          $this->childMap    = $data['childMap'];
  
          return true;
      }
docs: Try to load the combinations from cache.
  
  @return bool