import { Snakeified } from './stringCasing.js';
/**
 * Converts a string or the keys of an object to snake_case.
 *
 * Examples:
 *   snakeify('HelloWorld-how-are---you') // 'hello_world_how_are_you'
 *   snakeify('Hello.World') // 'hello.world'
 *   snakeify('Hello/World') // 'hello/world'
 *   snakeify({ helloWorld: now }) // { hello_world: now }
 *
 * @param target - The string or object to snakeify
 * @returns The snake_cased string or object
 */
export default function snakeify<const T, RT extends Snakeified<T>>(target: T): RT;
export declare function snakeifyString(str: string): string;