title: SilverStripe PHP Forms - If I nest a SelectionGroup inside a FieldGroup, one of the related SelectionGroup_Items' Radio Box does not show up. Why?
body: <p>I have a form that has two <code>FieldGroup</code>s, and in one of the <code>FieldGroup</code>s I have a <code>SelectionGroup</code>.</p>
  
  <p>The <code>SelectionGroup_Item</code>s show up in the form <code>FieldGroup</code> but the radio boxes to select one of the options doesn't show. If I remove the <code>FieldGroup</code> it then works again.</p>
  
  <p>I've looked at the framework templates, and if I change the <code>FieldGroup_holder.ss</code> <code>SmallFieldHolder</code> to <code>FieldHolder</code> the radio boxes appear again and work correctly. I've tried following the templates to see which one isn't obeying the <code>SelectionGroup</code> but I keep getting lost. </p>
  
  <p>Here's an example bit of code</p>
  
  <pre><code>$fields = FieldList::create(
      FieldGroup::create(
          TextField::create('Name', 'Name')
      ),
      FieldGroup::create(
          SelectionGroup::create(
              'Test1or2',
              array(
                  SelectionGroup_Item::create(
                      'Test1', array(
                          TextField::create('Test1', 'Test1')
                      ),
                      'Test1'
                  ),
                  SelectionGroup_Item::create(
                      'Test2', array(
                          TextField::create('Test2', 'Test2')
                      ),
                      'Test2'
                  )
              )
          )
      )
  ),
  FieldList::create(
      FormAction::create('submit', 'Submit')
  )
  </code></pre>