```ruby
module CC
  module Yaml
    module Nodes
      class Dependencies < OpenMapping
        map :files, to: FileDependencyList
      end
    end
  end
end
```

Make Dependencies a Mapping instead of an OpenMapping
user
```ruby
module CC
  module Yaml
    module Nodes
      class Dependencies < Mapping
        map :files, to: FileDependencyList
      end
    end
  end
end
```
assistant