Flow union type

Menu.js

/* @flow */
import * as React from 'react'
type BaseMenuPropsT = {
	icon: string | { img: string, ticker: number },
	label?: string
}

type RenderT = { render: () => React.Node }
type ChildrenT = { children: () => React.Node }
type DataT = { data: Object }
type MenuPropsT = BaseMenuPropsT & (RenderT | ChildrenT | DataT)

const Menu = (props: MenuPropsT) => (
	<div>`This are the props ${JSON.stringify(props)}`</div>  
)

const App = () =>
	<Menu icon="string" data={{}} />