title: Column visibility - column button not getting displayed
body: <p>I dont kow what i am doing wrong but the button column visibiltiy does not appear and there is no error on the console.</p>
  
  <p>Has anybody worked on datatable and buttons? </p>
  
  <pre><code>function createTable(data){ 
      alert(data.controlKpiList[0].ASP_NAME +"list");
  //  $("#example").dataTable().fnClearTable();
      vtable = $('#example').DataTable({
  
            'data': data.controlKpiList,
            columns: [
                      { "data": "ASP_NAME" },
  
                  ],
  
      "columnDefs": [
                     {
                         targets: 1,
                         className: 'noVis'
                     }
                 ],
                 "buttons": [                   
                                   {
                               extend: 'colvisGroup',
                               text: 'H1',                              
                               hide: [ 2,3 ]                                     
                           } ]
      });
      }
  </code></pre>