function groupBy(items: Record<string, any>[], key: string): Record<string, Record<string, any>[]> {

  const result: Record<string, any> = items.reduce((acc: Record<string, any>, item:Record<string, any>) => {
    const objectKey = item[key]

    if(objectKey) {
      if(!acc[objectKey]) {
        acc[objectKey] = []
      }
      acc[objectKey].push(item)
    }

    return acc
  }, {})

  return result;
}

// No modificar: necesario para evaluar el resultado.
export { groupBy };