import { MemoExoticComponent, ReactElement, ReactNode } from 'react';
/** Return `true` if given child is give React element */
export declare function isElement<P>(child: Exclude<ReactNode, boolean | null | undefined>, element: ((props: P) => JSX.Element | null) | MemoExoticComponent<(props: P) => JSX.Element | null>): child is ReactElement<P>;