js codebase migrating to typegraphql and ts but unsure of how to integrate existing js resolvers without rework to class decorators

[VortexH]

Hello, I have a microservice that uses ApolloServer and there are js based resolvers and gql files. In order to build the schema, we use the buildFederatedSchema method from @apollo/federation. The desire is to migrate to typescript but also avoid reworking the existing js resolvers and typedefs at this point in time. This would allow me to have a mix of js and ts and slowly migrate everything to the typegraphql way of doing things. Is it possible to use the existing typedefs and resolvers when calling buildSchema or do they need to be converted to decorated classes?

example folder structure:

project
│   README.md
└───graphql
│   l───resolvers
│       │   file1.js
│       │   ...
│   l───typedefs
│       │   example.gql
│       │   ...
      | index.js // exports a resolvers object and an array of typedef strings
 | server.js // uses buildFederatedSchema with the exported resolvers and typedefs and creates an `ApolloServer` instance