private ReferenceManager GetReferenceManager(Boolean refresh = false)
        {
            if (_referenceManager.IsNull() || refresh)
            {
                _referenceManager            = new ReferenceManagerSingleThreadCache();
                _referenceManager.DataSource = new ReferenceDataSource();
            }

            return(_referenceManager);
        }
 public ReferenceManagerSingleThreadCacheTest()
 {
     _referenceManager = null;
 }