protected override void Dispose(bool disposing)
        {
            if (buildAttrb != null)
            {
                buildAttrb = null;

                states.Clear();
                states = null;
            }
        }
 public DefPreProcessor(IBuildAttribute buildAttrb)
 {
     this.buildAttrb = buildAttrb ?? NopBuildAttrb.Instance;
     states          = new Stack <int>();
 }