import type { Iteratee } from '../types';
import type { Collection, Dictionary } from '@sdkset/types';
/**
 * 用于创建`countBy`、`groupBy`、`indexBy`、`partition`的内部函数。
 *
 * @example
 * _group(func)
 * => countBy
 * => groupBy
 * => indexBy
 *
 * _group(func, true)
 * => partition
 *
 * @param behavior 给定实现函数
 * @param partition partition 创建标识
 */
export declare function _group(behavior: (object: Dictionary, value: unknown, key: string) => unknown, partition?: boolean): <V extends Collection, I extends Iteratee<V, unknown>>(list: V, iteratee?: I | undefined, context?: unknown) => {};