bring back createStyles

packages/material-ui/src/styles/createStyles.d.ts

@@ -0,0 +1 @@
+export default function createStyles(styles: any): never;

packages/material-ui/src/styles/createStyles.js

@@ -0,0 +1,3 @@
+export default function createStyles(styles) {
+ return styles;
+}

packages/material-ui/src/styles/index.d.ts

@@ -16,6 +16,7 @@ export {
  PaletteOptions,
  SimplePaletteColorOptions,
 } from './createPalette';
+export { default as createStyles } from './createStyles';
 export {
  Typography as TypographyVariants,
  TypographyOptions as TypographyVariantsOptions,

packages/material-ui/src/styles/index.js

@@ -2,6 +2,7 @@ export { default as adaptV4Theme } from './adaptV4Theme';
 export * from './colorManipulator';
 export { default as createMuiTheme } from './createMuiTheme';
 export { default as unstable_createMuiStrictModeTheme } from './createMuiStrictModeTheme';
+export { default as createStyles } from './createStyles';
 export { getUnit as unstable_getUnit, toUnitless as unstable_toUnitless } from './cssUtils';
 export { default as makeStyles } from './makeStyles';
 export { default as responsiveFontSizes } from './responsiveFontSizes';