@mui/material/styles/createStyles.js

let warnedOnce = false;

// To remove in v6
export default function createStyles(styles) {
  if (!warnedOnce) {
    console.warn(['MUI: createStyles from @mui/material/styles is deprecated.', 'Please use @mui/styles/createStyles'].join('\n'));
    warnedOnce = true;
  }
  return styles;
}