import { normalObject, nullableObject } from '../types/helpers.js';
/**
 * Removes created/modified keys from current object in-place
 * @returns {Object} this
 */
export declare function removeTemplateTimestamps(object: any): nullableObject;
/**
 * Used to extract only specific keys into dedicated object
 * @param object {object} Keys to extract
 * @param keys {string[]} Keys to extract
 * @returns {object} Object with specified keys if any
 */
export declare function take(object: Record<string, any>, keys: string[]): object;
/**
 * Used to drop specified keys from object
 */
export declare function dropKeys(object: normalObject, keys: string[]): object;
export declare function prefixKeys(object: object, prefix: string): nullableObject;
export declare function getPrefixedKeys(object: object, prefix: string): string[];
export declare function extractPrefixedKeys(object: nullableObject, prefix: string, preservePrefix?: boolean): nullableObject;
export declare function exceptPrefixedKeys(object: nullableObject, prefix: string): nullableObject;
/**
 * Converts (possibly) infinitely (call stack is the limit) nested object into object with flat structure
 * Keys are paths to given values, joined together using `.`.
 * @example Input value
 * {
 *   "hello": {
 *     "world": "value"
 *   }
 * }
 *
 * Output value
 * {
 *   "hello.world": "value"
 * }
 *
 * @returns {object}
 */
export declare function flattenObject(value: nullableObject | string, keyPrefix?: string, acc?: normalObject): normalObject;