@Override
    public Object load2(LoaderHelper helper) {
      if (helper.getArgument() instanceof Integer) {
        try {
          Thread.sleep((Integer) helper.getArgument());
        } catch (InterruptedException ugh) {
          fail("interrupted");
        }
      }
      Object ret = helper.getKey();

      if (ret instanceof String) {
        if (ret != null && ret.equals(NON_EXISTENT_KEY)) {
          return null;
        }
      }
      return ret;

    }
Stops the cache server that serves up the given cache.

@param cache the cache
@since GemFire 4.0
geode-dunit/src/main/java/org/apache/geode/cache30/ClientServerTestCase.java