How can i pass custom arguments to field resolver in another federated service

[awkward-minion]

I am using apollo/federation to develop my application. How can i pass custom arguments to type resolver, so that the custom arguments are accessible from another service

Book service

// book graphql 
const Query = {
}
const Mutation = {
}
const Book = {
   author: ({id}:{id:string}, ...rest) : => {
     return {
          id,
          __typename: 'Teacher', // another service
          customArg1: 'custom arg1 value here',  // Can i pass these custom values to another service ?
          customArg2: 'custom arg2 value here',
        }
   }
}
export default {
  Query,
  Mutation,
  Book
}

Teacher service

// Teacher graphql 
const Query = {
}
const Mutation = {
}
const Teacher = {
  __resolveReference: async (
    { id }: { id: string },
    arg1,
    arg2
  ): Promise<void> => {
    // <--------------- I want to receive custom args here 
    return teacherObject;
  },
}
export default {
  Query,
  Mutation,
  Teacher
}

Here in above example snippet, Can i pass customArg1 and customArg2 to teacher graphql service from book graphql service.

[glasser]

Those should show up right next to the id in the representation (first argument to __resolveReference)

[jujasp]

I have a similar set up but my custom arguments are returned undefined - any idea how I can expose them?