Is it possible to use selectionSet in resolver using LocalGraphQLDataSource of apollo gateway?

Help
#1

I am using apollo gateway as follows.

// index.ts
const apolloGateway = new ApolloGateway({
    supergraphSdl,
    buildService: ({ name, url }) => {
        if (name === 'local') {
            return new LocalGraphQLDataSource(
                buildSubgraphSchema({
                  typeDefs,
                  resolvers,
                }),
            );
        }
        return new MyStoreDataSource(name as ServiceName, {
            url,
        });
    },
});

// resolvers.ts
export const QueryResolver = {
  Query: {
    async user_list(source, args, context, info) { 
      ...
      return remote.call // request with info and [UserItem!]!
    },
  },
  UserItem: {
    name: {
      selectionSet: '{ id, age }', // not working
      resolve(user_item: any, args: any, context: Context, info: GraphQLResolveInfo) {
        ...
      }
    }
  }
};

I’d like to use a selectionSet like stitch for the resolver, but this doesn’t seem to work unfortunately.

can i solve this?