Is it possible to nest data sources?

[finleygn]

Hi there, I'm currently trying to clean up my apollo-datasource-rest sources to have them grouped by backend like:

new ApolloServer({
  typeDefs: schema,
  resolvers: resolver,

  dataSources: (): any => ({
    legacy: {
      user: new UserAPI(),
      post: new PostAPI(),
      comment: new CommentAPI(),
    },
    // ... other sources
  }),
  
  context: () => ({
    someConfig: true,
  }),
});

When I structure them like this (nested in legacy), this.context is not defined when calling the instance methods of the data sources.
Is there any / a recommended way to do this?