title: How set not-visible an item than not have the "visible" property?
body: <p>I have a button and a grid below.
  Inside the grid I have some elements (input, checkbox, label, ...)
  How can I set not visible all the elements inside the grid together together at once?</p>
  
  <pre><code>&lt;Grid xmlns="sap.ui.layout" id="idGrid"&gt;
              &lt;content&gt;
  
                  &lt;Label xmlns="sap.m"
                      id="idLabel"
                      design="Standard"
                      text="the label"&gt;
                  &lt;/Label&gt;
  
                  &lt;Input xmlns="sap.m"
                      id="idInput"
                      value="the input"&gt;
                  &lt;/Input&gt; 
  
              &lt;/content&gt; 
  &lt;/Grid&gt;
  </code></pre>