@mui/base/modern/generateUtilityClasses/index.js

Base UI is a library of headless ('unstyled') React components and low-level hooks. You gain complete control over your app's CSS and accessibility features.

import { generateUtilityClass } from '../generateUtilityClass';
export function generateUtilityClasses(componentName, slots) {
  const result = {};
  slots.forEach(slot => {
    result[slot] = generateUtilityClass(componentName, slot);
  });
  return result;
}