export declare type compareFn<T> = (a: T, b: T) => number;
export declare type calledFn<T> = (v: T, i: number, x: T[]) => void;
export declare type testFn<T> = (v: T, i: number, x: T[]) => boolean;
export declare type mapFn<T, U> = (v: T, i: number, x: T[]) => T | U;
export declare type getFn<T> = () => T;
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