private ItemContainerPattern(AutomationElement el, UIAutomationClient.IUIAutomationItemContainerPattern pattern, bool cached)
     : base(el, cached)
 {
     Debug.Assert(pattern != null);
     this._pattern = pattern;
 }
 private ItemContainerPattern(AutomationElement el, UIAutomationClient.IUIAutomationItemContainerPattern pattern, bool cached)
     : base(el, cached)
 {
     Debug.Assert(pattern != null);
     this._pattern = pattern;
 }