export declare function mapObject<K extends string | number, V = any>(obj: {
    [key: string]: V;
}, valueTransform: null, keyTransform: (key: K) => string | number): Record<string, V>;
export declare function mapObject<K extends string | number, V = any, R = any>(obj: {
    [key: string]: V;
}, valueTransform: (value: V) => R, keyTransform?: (key: K) => string | number): Record<string, R>;
/**
 * Accepts an object and maps any numeric keys to `_`-prefixed strings
 */
export declare const mapNumerics: (obj: any, prefix?: string) => Record<string, any>;
/**
 * Accepts an object returned from mapNumerics and maps back to numeric keys
 */
export declare const unmapNumerics: (obj: any, prefix?: string) => Record<string, any>;
export declare const copySimpleObj: <T>(obj: T) => T;
export declare const pick: <T, K extends keyof T>(obj: T, keys: K[]) => Pick<T, K>;
export declare const formDataArray: <T extends any[]>(arr: T) => { [K in keyof T]: T[K]; };
export declare function addHiddenProp(object: any, propName: PropertyKey, value: any): void;
export declare function getInheritedHiddenProp<T>(target: any, propName: PropertyKey, type: 'prototypical'): Record<any, T>;
export declare function getInheritedHiddenProp<T>(target: any, propName: PropertyKey, type: (target: any, inherit: T) => T): T;
export declare function getInheritedHiddenProp<T>(target: any, propName: PropertyKey, defaultValue: Record<any, T> | 'object'): Record<any, T>;
export declare function getInheritedHiddenProp<T>(target: any, propName: PropertyKey, defaultValue: T[] | 'array'): T[];
export declare function getInheritedHiddenProp<T>(target: any, propName: PropertyKey, defaultValue: 'set'): Set<T>;