title: SAPUI5 - Sap.m.RadioButton Value Field?
body: <p><code>sap.m.RadioButton</code> has got only <code>Text</code> attribute and does not have a <code>Value</code> attribute. 
  While I can work around this by using custom data, is there anything I am missing?  <code>sap.ui.commons.RadioButton</code> has got a <code>key</code> field.  </p>
  
  <p>Also, what is good way to bind a value to a Radio Button Group(with <code>sap.m.Radiobutton</code> controls) in XML View</p>