'Is there any way to set default value for extended property in subgraph, for case of if property is null in supergraph?

type Book @key(fields: "id language country name desc") @extends {
  id: ID! @external
  language: String! @external
  country: String @external
  name: String! @external
  description: String! @external
  information: MetaInformation @requires(fields: "id language country name desc ")
}

here I extended book with information property and other ones are coming from Book graph, I want to know how I can set default value for country? It can be null in Book graph but it requires for fetching information property or somehow I should handle it in datafetcher.

graphql apollo-federation

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'Is there any way to set default value for extended property in subgraph, for case of if property is null in supergraph?

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