.TreeNodeOver_SingleSelect of Classic RadTreeView control is not working

[Sachita]

Hi Team,

We have migrated all RadTreeView Classic to RadTreeView Ajax Controls.

https://docs.telerik.com/devtools/aspnet-ajax/controls/treeview/appearance-and-styling/migrating-skins 

Modified existing skin as per above document but could not find anything related to SingleSelect_Hover,SingleSelect_Select,Disabled.

Code before migrating existing default skin:

 private const string SINGLE_SELECT_HOVER_CSS_CLASS = "TreeNodeOver_SingleSelect";
        private const string SINGLE_SELECT_CSS_CLASS = "TreeNodeSelect_SingleSelect";
        private const string DISABLED_CSS_CLASS = "TreeNodeDisabled";

Can anyone help how to modify changes programattically with any example?