fem_tutos/node_modules/@mui/utils/esm/setRef/setRef.js

/**
 * TODO v5: consider making it private
 *
 * passes {value} to {ref}
 *
 * WARNING: Be sure to only call this inside a callback that is passed as a ref.
 * Otherwise, make sure to cleanup the previous {ref} if it changes. See
 * https://github.com/mui/material-ui/issues/13539
 *
 * Useful if you want to expose the ref of an inner component to the public API
 * while still using it inside the component.
 * @param ref A ref callback or ref object. If anything falsy, this is a no-op.
 */
export default function setRef(ref, value) {
  if (typeof ref === 'function') {
    ref(value);
  } else if (ref) {
    ref.current = value;
  }
}