export function H3({ children, className, headingClassName, ...rest }: { [x: string]: any; children: any; className: any; headingClassName: any; }): React.FunctionComponentElement>>; export namespace H3 { namespace propTypes { let children: PropTypes.Requireable; let className: PropTypes.Requireable; let headingClassName: PropTypes.Requireable; } } import React from 'react'; import PropTypes from 'prop-types';