export type Augmented<Fn extends any> = Fn & {
    target: Fn;
    "0": any;
    "1": any;
    "2": any;
};
export declare function isAugmented<Fn extends Function>(fn: Fn): fn is Augmented<Fn>;
/**
 * Augment a function with a target and up to two arguments.
 * Calling this mutates the function to augment, so the function argument must be defined when calling augment() only!
 * In other words, you should do: `augment((x: number) => x + 1)` and not: `augment(previouslyDefinedFunction)`.
 */
export default function augment<A extends Function, Target extends Function>(augmented: A, target: Target, arg0?: any, arg1?: any, arg2?: any): Augmented<A>;