Configures the sorting behavior of the TreeGrid.
boolean
If set to false, the user cannot reset the TreeGrid to an unsorted state by clicking on the sorted column header. When true, clicking an already sorted column header will toggle the sort direction or remove sorting.
Defaults to true
Specifies the columns to be sorted at initial rendering of the TreeGrid. This property can also be used to get or modify the currently sorted columns at runtime.
Defaults to []