export function isClass(obj: any): boolean;
export function isClassComponent(component: any): boolean;
export function isFunctionComponent(component: any): boolean;
export function isComponent(component: any): boolean;
export function isElement(element: any): boolean;
export function isFragment(element: any): boolean;
export function childIterator(children: Children, all?: boolean): any;
export function childDescender(children: Children, shouldDescend?: boolean | shouldDescendPredicate): any;
export function flattenChildren(children: Children, shouldDescend?: boolean | shouldDescendPredicate): Array<FlattenedChild>;
export namespace flattenChildren {
    export { Primitive };
}
export function filterChildren(children: Children, predicate: (child: Child, index: number, children: Children) => boolean, all?: boolean): (string | number | import("react").ReactElement<any, string | import("react").JSXElementConstructor<any>> | Iterable<import("react").ReactNode> | import("react").ReactPortal)[];
export function cloneChildren(children: Children, predicate: object | ((child: Child, index: number, children: Children) => Child)): (string | number | import("react").ReactElement<any, string | import("react").JSXElementConstructor<any>> | Iterable<import("react").ReactNode> | import("react").ReactPortal)[];
export const Primitive: unique symbol;
export type Children = Parameters<typeof Children.toArray>[0];
export type ChildArray = ReturnType<typeof Children.toArray>;
export type Child = (string | number | import("react").ReactElement<any, string | import("react").JSXElementConstructor<any>> | Iterable<import("react").ReactNode> | import("react").ReactPortal)[][0];
export type ReactElement = import('react').ReactElement;
export type shouldDescendPredicate = (child: Child, validElement: boolean) => undefined | -1 | 0 | 1 | boolean;
export type FlattenedChild = {
    key: string;
    ref: import('react').Ref<HTMLElement>;
    type: import('react').JSXElementConstructor<any>;
    props: {
        [key: string]: any;
    };
};
import { Children } from 'react';