export type ValueOptions = number | string | boolean;
export type ArrayOptions = ValueOptions[];
export type OptionsValue = ValueOptions | ArrayOptions;
export type Options = {
    [key: string]: OptionsValue;
};
export declare const optionify: (options: Options) => string;
export declare const fetchAndCheck: (url: string, requestInit?: RequestInit) => Promise<Response>;
export declare const assertOk: (response: Response) => Promise<void>;
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