import React from 'react';
import { IItemDescriptor } from './types/IItemDescriptor.type';
export type { IItemDescriptor };
export type { IRoutableItemDescriptor } from './types/IRoutableItemDescriptor.type';
/**
 * @internal
 */
export declare function mapItemToJSX(item: IItemDescriptor): React.ReactNode;
/**
 * 打平嵌套结构，得到由叶子节点组成的数组。
 * 类似于将`[item1, [item2, item3], item4]`变成`[item1, item2, item3, item4]`
 */
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