Changes to ExecutableSchema are not reflected in federation introspection queries

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What happened?

We modify our ExecutableSchema by augmenting the Definition value of some fields based on their directives before calling handler.New upon it. These augmented values are not visible in the introspection query results.

It appears that the query results are being driven only by the value of the sources global var in the package populated by gqlgen's codegen.

What did you expect?

We expected to be able to see such changes in the introspection query results.

versions

• go run github.com/99designs/gqlgen version?

v0.17.16

• go version?

go version go1.19.2 darwin/arm64

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Note the same problem obtains if I move the decoration logic to a MutateConfig plugin — the schema accepts the changes but the source string does not, and that is the basis for the federation introspection query.