private static PluginWindowActivation DefaultActivation(XplorerUiElement attribute)
 {
     var useContainer = attribute != null
         ? attribute.Activation
         : PluginWindowActivation.OnLoad;
     return useContainer;
 }
 private static PluginWindowCloseAction DefaultUiCloseAction(XplorerUiElement attribute)
 {
     var useContainer = attribute != null
         ? attribute.CloseAction
         : PluginWindowCloseAction.Close;
     return useContainer;
 }
 private static PluginWindowUiContainerEnum DefaultContainer(XplorerUiElement attribute)
 {
     var useContainer = attribute != null
         ? attribute.InitialContainer
         : PluginWindowUiContainerEnum.LayoutDoc;
     return useContainer;
 }