title: Active admin Index page hide column based on condition
body: <p>Active admin index page i want to hide the column based on some condition , but the below code is not wokrking.</p>
  
  <pre><code>index title: 'Comp-Off', download_links: false do
      selectable_column
      if proc{ !(current_user.has_role? :Employee) }
        column("Name", sortable: :name)      {|resource| resource.employee.name}
        column("ID", sortable: :employee_id) {|resource| resource.employee.employee_id}
      end
      column :status
  end
  </code></pre>
  
  <p>How to solve this problem.</p>