Function isValidIndex

packages/core/src/utils/funcs.ts:46–50

(i: any)

 * @internal please do not use.
 */
export function isValidIndex(i: any): i is number | string {
  const a = [];
  a[i] = 1;
  return !!a.length && a[i] === 1;
}

/**
 * @internal please do not use.