You will not need this in your application here because the list is homogeneous, but you could imagine scenarios where this metadata would be very useful.

您的应用程序现在还不需要它，因为列表具有相同的作用，但在某些场景中这个元数据是非常有用的。

youdao

The emphasis, of course, is on performance here with nary a rotary nor fader in sight (we imagine you'd be using your other controller for that, right?).

ENGADGET