title: How to set value in odata of radiobuttons like inputfield
body: <p>I am creating a form now. In a line I need only answer with yes or no. the Code now looks like this</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
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  <pre class="snippet-code-js lang-js prettyprint-override"><code>&lt;Label text="Billable" 
   labelFor="flag"/&gt;
  &lt;Input value="{appointments&gt;flag}"
   id="flag"
   placeholder="set a flag in true or false"/&gt;</code></pre>
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  <p>and i need radiobuttons with yes or no. I have tried to write radiobutton, but it does not work</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-js lang-js prettyprint-override"><code>&lt;Label text="Billable" /&gt;
  &lt;VBox binding="{appointments&gt;flag}"&gt;
   &lt;RadioButton  text="true"/&gt;
   &lt;RadioButton  text="false"/&gt;
  &lt;/VBox&gt;</code></pre>
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  <p>the value property an the RadioButton is not allowed. How can i set the value from radioButton to the {appointments>flag} in ODatamodel like inputfield as above?</p>