@mui/system/esm/memoize/memoize.js

MUI System is a set of CSS utilities to help you build custom designs more efficiently. It makes it possible to rapidly lay out custom designs.

export default function memoize(fn) {
  const cache = {};
  return arg => {
    if (cache[arg] === undefined) {
      cache[arg] = fn(arg);
    }
    return cache[arg];
  };
}