function groupBy<T extends Record<string, any>, K extends keyof T>(
  array: T[],
  key: K
): Record<T[K], T[]> {
  return array.reduce((acc, item) => {
    const groupKey = item[key];
    if (!acc[groupKey]) {
      acc[groupKey] = [];
    }
    acc[groupKey].push(item);
    return acc;
  }, {} as Record<T[K], T[]>);
}