export default PageHeader; declare class PageHeader extends React.PureComponent { constructor(props: Readonly); constructor(props: any, context?: any); handleClick: (e: any) => void; render(): JSX.Element; } declare namespace PageHeader { export namespace propTypes { export const title: PropTypes.Validator; export const subtitle: PropTypes.Requireable; export const linkLabel: PropTypes.Requireable; export const onLinkClick: PropTypes.Requireable<(...args: any[]) => any>; export const children: PropTypes.Requireable; } } import React from "react"; import PropTypes from "prop-types";