export type Index<T> = {
    [key: string]: T;
};
export type Option<T> = T | undefined;
export declare const map: <A, B>(a: Option<A>, f: (a: A) => B) => Option<B>;
export declare const flatMap: <A, B>(a: Option<A>, f: (a: A) => Option<B>) => Option<B>;
export declare const getOrElse: <T>(t: Option<T>, _default: T) => T;
export declare const obfuscateString: (rawString?: string) => string | undefined;