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Summary: This PR adds a `functionTypeAnnotation` function to the codegen Parser class and implements it in the Flow and TypeScript parsers as requested on https://github.com/facebook/react-native/issues/34872, refactoring the `throwIfModuleTypeIsUnsupported` function to accept a `Parser` instead of a `ParserType` and use the newly created function instead of the `if (language)` logic. ## Changelog [Internal] [Added] - Add `functionTypeAnnotation` to codegen Parser class Pull Request resolved: https://github.com/facebook/react-native/pull/36468 Test Plan: Run `yarn jest react-native-codegen` and ensure CI is green  Reviewed By: cipolleschi Differential Revision: D44056853 Pulled By: rshest fbshipit-source-id: f22b9efe53df16f7916eb1a9cea8b9531f1194f5
@react-native/codegen
Installation
yarn add --dev @react-native/codegen
Note: We're using yarn to install deps. Feel free to change commands to use npm 3+ and npx if you like
Testing
To run the tests in this package, run the following commands from the react Native root folder:
yarnto install the dependencies. You just need to run this onceyarn jest react-native-codegen.