export declare function flip<K extends string, V extends string>(obj: Record<K, V>): Record<V, K>;
export declare function omit<T extends Record<string, unknown>, K extends (keyof T)[]>(source: T, keys: K): Omit<T, K[number]>;
export declare function clone<T>(source: T): T;
export declare function hasProperty<T extends Record<string | symbol, unknown>>(needle: T, property: unknown): property is keyof T;
export type MapKeysCallback<PreviousKey extends PropertyKey, Value, NewKey extends PropertyKey> = (key: PreviousKey, value: Value) => NewKey;
export declare function mapKeys<K extends PropertyKey, V, Key extends PropertyKey>(object: Record<K, V>, callback: MapKeysCallback<K, V, Key>): Record<Key, V>;
export type MapValuesCallback<Key extends PropertyKey, PreviousValue, NewValue> = (key: Key, value: PreviousValue) => NewValue;
export declare function mapValues<Key extends PropertyKey, PreviousValue, NewValue>(object: Record<Key, PreviousValue>, callback: MapValuesCallback<Key, PreviousValue, NewValue>): Record<Key, NewValue>;
export type MapEntriesCallback<PreviousKey extends PropertyKey, PreviousValue, NewKey extends PropertyKey, NewValue> = (key: PreviousKey, value: PreviousValue) => [NewKey, NewValue];
export declare function mapEntries<PreviousKey extends PropertyKey, PreviousValue, NewKey extends PropertyKey, NewValue>(object: Partial<Record<PreviousKey, PreviousValue>>, callback: MapEntriesCallback<PreviousKey, PreviousValue, NewKey, NewValue>): Partial<Record<NewKey, NewValue>>;
export declare function isEmptyObject(value: unknown): value is Record<string, never>;
export declare function isTypeRequired<T extends Record<PropertyKey, unknown>>(value: Partial<T>): value is Required<T>;
export declare function hasString<T extends Record<PropertyKey, unknown>>(obj: T, str: string): boolean;
export declare function isRecord(item: unknown): item is Record<PropertyKey, unknown>;
/**
 * @deprecated Please use lodash.merge instead.
 */
export declare function merge<T extends Record<PropertyKey, unknown>>(target: T, ...sources: T[]): T;
type EmptyObjectsRemoved<T extends Record<PropertyKey, unknown>> = {
    [P in keyof T]: T[P] extends Record<PropertyKey, unknown> ? EmptyObjectsRemoved<T[P]> | undefined : T[P];
};
export declare function removeEmptyObjects<T extends Record<PropertyKey, unknown>>(input: T): EmptyObjectsRemoved<T>;
export {};