title: angular material mat radio button unchecked on multiple click
body: <p>How can I clear <code>&lt;mat-radio-button&gt;</code> selected on second click 
  (after it is already selected)</p>
  
  <p>I know I can implement this behavior with checkbox but i need to allow select only one item.</p>
  
  <p>Any help?</p>
  
  <p><strong>My code look like :</strong> </p>
  
  <pre><code>&lt;mat-radio-group name="WasFamilyMemberPresent"&gt;
      &lt;mat-radio-button *ngFor="let item of lookupNoYes" [value]="item.Code" &gt;
         {{item.Desc}}
      &lt;/mat-radio-button&gt;
  &lt;/mat-radio-group&gt;
  </code></pre>