How can i change syle on the colvis button

Sergey.Volchenkov@arris.com

good day, did somebody change style on colvis button?
i am trying, when few columns hidden, change class on restore columns button,
and then, when all columns will be showing, change class on "Restore column button" to other;

1. var nButtons = [];
   2.//button for hide columns
   buttons.push({ extend: 'colvisGroup', text: 'Meeting', show: [ 1, 2 ], hide: [ 3,4] });
   3.//button for show all columns
   var buttonRestoreColumns = {extend: 'colvisGroup', text: 'Restore Columns', show: ':hidden'});
   nButtons.push({extend: 'colvisGroup', text: 'Restore Columns', show: ':hidden'});

//onChange
$(this.tName).on( 'column-visibility.dt', function ( e, settings, column, state ) {
buttonRestoreColumns.addClass('orange');//no working
AJS.$(buttonRestoreColumns).addClass('orange');//no working
buttonRestoreColumns.addClass('orange').draw();//no working
} );