title: Show / hide option of menu depending some conditions
body: <p>I want to show / hide an option from menu depending some field from user table. Exist a way to do that ? For example if user.isFirst() then hide option 'Product' from menu.</p>
  
  <pre><code>easy_admin:
  site_name: '&lt;img src="/build/images/logo.png" alt="dfg" /&gt;'
  formats:
      datetime: 'Y-m-d'
  design:
      brand_color: '#009036'
      color_scheme: 'light'
      form_theme: 'vertical'
      templates:
          layout: 'admin/default/layout.html.twig' #for rewrite layout and add edit my account button
  
      menu:
      - label: 'menu.labels.dashboard'
        route: 'route_declarant_dashboard'
        icon: 'dashboard'
        default: true
        params:
            menuIndex: 0
      - label: 'menu.labels.products'
        entity: 'Products'
        icon: 'shopping-bag'
      - label: 'menu.labels.users'
        entity: 'Users'
        icon: 'bullhorn'  
  </code></pre>
  
  <p>So the idea is : </p>
  
  <ol>
  <li><p>Hide "Products" --> if user.isFirst() </p></li>
  <li><p>Show "Products" --> other cases.</p></li>
  </ol>