Remove dependency on graphql-js internal Maybe type #4230
Merged
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Closes #4223
Per graphql/graphql-js#2621 (comment),
Maybe
is an internal type for graphql-js, which is why it isn't re-exported from index.d.ts. They moved it fromtsutils
tojsutils
in v15.1.0 which breaks the deep import in apollo-federation.This PR solves the issue by defining
Maybe
internally rather than importing it from graphql-js.