void SetSource(RadioButtonsSourceLocation location)
 {
     switch(location)
     {
         case RadioButtonsSourceLocation.Items:
             elements.GetSourceComboBox().SelectItemByName("ItemsComboBoxItem");
             break;
         case RadioButtonsSourceLocation.ItemSource:
             elements.GetSourceComboBox().SelectItemByName("ItemsSourceComboBoxItem");
             break;
     }
 }