How to create generics with the schema language?

Using facebook's reference library, I found a way to hack generic types like this:

type PagedResource<Query, Item> = (pagedQuery: PagedQuery<Query>) => PagedResponse<Item>
​
interface PagedQuery<Query> {
  query: Query;
  take: number;
  skip: number;
}
​
interface PagedResponse<Item> {
  items: Array<Item>; 
  total: number;
}

function pagedResource({type, resolve, args}) {
  return {
    type: pagedType(type),
    args: Object.assign(args, {
      page: { type: new GraphQLNonNull(pageQueryType()) }
    }),
    resolve
  };
  function pageQueryType() {
    return new GraphQLInputObjectType({
      name: 'PageQuery',
      fields: {
        skip: { type: new GraphQLNonNull(GraphQLInt) },
        take: { type: new GraphQLNonNull(GraphQLInt) }
      }
    });
  }
  function pagedType(type) {
    return new GraphQLObjectType({
      name: 'Paged' + type.toString(),
      fields: {
        items: { type: new GraphQLNonNull(new GraphQLList(type)) },
        total: { type: new GraphQLNonNull(GraphQLInt) }
      }
    });
  }
}

But I like how with Apollo Server I can declaratively create the schema. So question is, how do you guys go about creating generic-like types with the schema language?