/**
 * Require the keys K from T if optional.
 */
export type Require<T, K extends keyof T> = T & {
    [P in K]-?: T[P];
};
/**
 * Format an unknown value to a string for display
 */
export declare function stringify(value: unknown): string;
/**
 * Chain a list of functions
 * @returns a function that accepts the args of the first function in the functions list. Each subsequent function is invoked with
 * the return value of the previous function.
 */
export declare function chain<TArgs extends any[], T1>(functions: [(...args: TArgs) => T1]): (...args: TArgs) => T1;
export declare function chain<TArgs extends any[], T1, T2>(functions: [(...args: TArgs) => T1, (arg: T1) => T2]): (...args: TArgs) => T2;
export declare function chain<TArgs extends any[], T1, T2, T3>(functions: [(...args: TArgs) => T1, (arg: T1) => T2, (arg: T2) => T3]): (...args: TArgs) => T3;
export declare function chain<TArgs extends any[], T1, T2, T3, T4>(functions: [(...args: TArgs) => T1, (arg: T1) => T2, (arg: T2) => T3, (arg: T3) => T4]): (...args: TArgs) => T4;
export declare function chain<TArgs extends any[], T1, T2, T3, T4, T5>(functions: [(...args: TArgs) => T1, (arg: T1) => T2, (arg: T2) => T3, (arg: T3) => T4, (arg: T4) => T5]): (...args: TArgs) => T5;