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@juln/type-fest

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A collection of essential TypeScript types

github.com/z-juln/type-fest

z-juln/type-fest

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export type PromiseFn<T extends (...args: any) => any> = ( ...args: Parameters<T> ) => Promise<ReturnType<T>>; export type PromisableFn<T extends (...args: any) => any> = ( ...args: Parameters<T> ) => Promise<ReturnType<T>> | ReturnType<T>;