export function sortKeys(obj: Record<any, any>): Record<any, any> {
  obj = obj || {};
  const ordered = {};
  Object.keys(obj)
    .sort()
    // .reverse()
    .forEach(function (key) {
      ordered[key] = obj[key];
    });
  return ordered;
}

export function intersection<T>(a: T[][]): T[] {
  return a.reduce((p, c) => p.filter((e) => c.includes(e)));
}