The function `withInfo(...)` in `@storybook/addon-info` accepts 0 or 1 argument. import * as React from 'react'; import { storiesOf } from '@storybook/react'; import { withInfo } from '@storybook/addon-info'; const { Component } = React; storiesOf('Component', module) .add('no info', withInfo()(() => Click the "?" mark at top-right to view the info. ) ); The example above works well in JavaScript. But it does not compile in TypeScript: `TS2554: Expected 1 arguments, but got 0.`. So I would like to modify the definition of the function `withInfo` in `storybook__addon-info` from... withInfo(textOrOptions: string | Options) ...to... withInfo(textOrOptions?: string | Options)