Apps Add In 28 Filled icon

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 28 28" width="24" height="24"><path fill="currentColor" d="M21 2a1 1 0 0 1 1 1v3h3a1 1 0 1 1 0 2h-3v3a1 1 0 1 1-2 0V8h-3a1 1 0 1 1 0-2h3V3a1 1 0 0 1 1-1ZM6 3a3 3 0 0 0-3 3v16a3 3 0 0 0 3 3h16a3 3 0 0 0 3-3v-6a3 3 0 0 0-3-3h-7V6a3 3 0 0 0-3-3H6Zm7 10H5V6a1 1 0 0 1 1-1h6a1 1 0 0 1 1 1v7Zm2 10v-8h7a1 1 0 0 1 1 1v6a1 1 0 0 1-1 1h-7Zm-2 0H6a1 1 0 0 1-1-1v-7h8v8Z"/></svg>