```ruby
module DeepCover
  class Node
    class Arg < Node
      has_child name: Symbol
      def executable?
        false
      end
    end
    Kwarg = Arg

    class Restarg < Node
      has_child name: [Symbol, nil]
      def executable?
        false
      end
    end
    Kwrestarg = Restarg

    class Optarg < Node
      has_tracker :default
      has_child name: Symbol
      has_child default: Node, flow_entry_count: :default_tracker_hits, rewrite: '(%{default_tracker};%{node})'
      def executable?
        false
      end
    end
    Kwoptarg = Optarg

    # foo(&block)
    class Blockarg < Node
      has_child name: Symbol

      def executable?
        false
      end
      # TODO
    end

    class Args < Node
      has_child arguments: [Arg, Optarg, Restarg, Kwarg, Kwoptarg, Kwrestarg, Blockarg], rest: true
    end
  end
end
```

Mark args as non executable
user
```ruby
module DeepCover
  class Node
    class Arg < Node
      has_child name: Symbol
      def executable?
        false
      end
    end
    Kwarg = Arg

    class Restarg < Node
      has_child name: [Symbol, nil]
      def executable?
        false
      end
    end
    Kwrestarg = Restarg

    class Optarg < Node
      has_tracker :default
      has_child name: Symbol
      has_child default: Node, flow_entry_count: :default_tracker_hits, rewrite: '(%{default_tracker};%{node})'
      def executable?
        false
      end
    end
    Kwoptarg = Optarg

    # foo(&block)
    class Blockarg < Node
      has_child name: Symbol

      def executable?
        false
      end
      # TODO
    end

    class Args < Node
      has_child arguments: [Arg, Optarg, Restarg, Kwarg, Kwoptarg, Kwrestarg, Blockarg], rest: true
      def executable?
        false
      end
    end
  end
end
```
assistant