code: static MPApiResponse getFromCache(String key) {
          HashMap<String, MPApiResponse> mapCache = getMapCache();
          MPApiResponse response = null;
          try {
              response = mapCache.get(key).clone();
          } catch (Exception ex) {
              // Do nothing
          }
          if (response != null) {
              response.fromCache = Boolean.TRUE;
          }
          return response;
      }
docs: Retrieves an entry from the cache.
  
  @param key           String with cache entry key
  @return              MPApiResponse cached object, null if it does not exists