@Override
  public CqQuery getCq(String cqName) {
    preOp();
    if (cqNames.contains(cqName)) {
      return realQueryService.getCq(cqName);
    } else {
      return null;
    }
  }
A wrapper class over an actual QueryService instance. This is used when the
multiuser-authentication attribute is set to true.

@see ProxyCache
@since GemFire 6.5
geode-core/src/main/java/org/apache/geode/cache/query/internal/ProxyQueryService.java