Please export ThemeOptions

[benwiley4000]

• I have searched the issues of this repository and believe that this is not a duplicate.

Summary 💡

I'm doing this in my code:

import { ThemeOptions } from "@material-ui/core/styles/createMuiTheme";

Seems like my import path could be less fragile if we export ThemeOptions from a higher level, hopefully at the top.

Examples 🌈

import { ThemeOptions } from "@material-ui/core";

Motivation 🔦

Just nicer code that doesn't risk breaking when there's an update to the dependency.

[oliviertassinari]

If we can update the documentation, it would probaby be great too:

diff --git a/docs/src/pages/guides/typescript/typescript.md b/docs/src/pages/guides/typescript/typescript.md
index c2b1255eb..8371737e4 100644
--- a/docs/src/pages/guides/typescript/typescript.md
+++ b/docs/src/pages/guides/typescript/typescript.md
@@ -242,8 +242,7 @@ And a custom theme factory with additional defaulted options:

 **./styles/createMyTheme**:
 ```ts
-import { createMuiTheme } from '@material-ui/core/styles';
-import { ThemeOptions } from '@material-ui/core/styles/createMuiTheme';
+import { createMuiTheme, ThemeOptions } from '@material-ui/core/styles';

 export default function createMyTheme(options: ThemeOptions) {
   return createMuiTheme({

[oliviertassinari]

Solved by #19789