title: How do I draw all the border to angular grid list material?
body: <p>I am working on angular material grid list. How can I apply/draw black border and its thickness on all the mat-grid-tile as shown below? What is the class name to edit the css for the mat-grid-tile?</p>
  
  <pre><code>&lt;mat-grid-list cols="12" rowHeight="200px"&gt;
      &lt;mat-grid-tile colspan="3" rowspan="1"&gt;Text&lt;/mat-grid-tile&gt;
      &lt;mat-grid-tile colspan="3" rowspan="1"&gt;Text&lt;/mat-grid-tile&gt;
      &lt;mat-grid-tile colspan="3" rowspan="1"&gt;Text&lt;/mat-grid-tile&gt;    
      &lt;mat-grid-tile colspan="3" rowspan="1"&gt;Text&lt;/mat-grid-tile&gt;
  &lt;/mat-grid-list&gt;
  </code></pre>