Thanks Tobias! Works well.
A note for others. My case was a little more complicated because I already had some code in “Custom Commands”. I needed to add a comma between the two commands , as in:
“columnDefs”: [ { “className”: “none”, “targets”: [ 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 ,18, 19, 20, 21] } ], “searchPanes”: { “initCollapsed”: true }