Kendo UI TreeListToolbar class
The click handler of the toolbar command. Used for custom toolbar commands.
A class name to render inside the toolbar button. When you set this option, the TreeList renders an additional span element inside the toolbar button, with a class name set to the option value. This allows you to display an icon inside your custom toolbar commands.
The name of the toolbar command. Either a built-in ("create", "excel", "pdf") or a custom string. The name is output in the HTML as a value of the data-command attribute of the button.
The text displayed by the command button. If not set the name` option would be used as the button text instead.
Serialize current instance to Dictionary