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export type FlatType<T> = T extends Record<PropertyKey, unknown>  ? { [K in keyof T]: FlatType<T[K]> }  : T;
export type TupleToIntersection<T> = T extends readonly [] ? never  : T extends readonly [infer U] ? U  : T extends readonly [infer U, ...infer R] ? U & TupleToIntersection<R>  : never;
export type Writable<T> = { -readonly [P in keyof T]: T[P] };