Because of: https://github.com/hey-api/openapi-ts/blob/acac2979a68a9a09aaf276b8e372309debd77d3e/examples/openapi-ts-fetch/src/client/client/utils.ts#L284 you'll get a type error when attempting to compile a client with ```json "lib": ["ES2022", "dom"], // no dom.iterable ``` > TS2339: Property 'entries' does not exist on type 'Headers'.