def can_interpret?(parent, keyword, *args, &block)
          keyword == 'selection' and
            block.nil? and
            (parent.is_a?(Glimmer::SWT::Custom::RadioGroup) or (parent.is_a?(Glimmer::UI::CustomWidget) and parent.body_root.is_a?(Glimmer::SWT::Custom::RadioGroup)) ) and
            args.size == 1 and