Row key for custom form view

[Koichi_Tsuji]

@Aleksi
@Steve

It is possible I may have overlooked the announcement for new feature of this, but I noticed there is additional new optoin for form view. This option seems not to be avaialble on system generated form view, but custom made form view.

What does this new option will do for us ? When is it recommended as use cases?

We passed one key value to this option, but could not observe any changes in app behavior.

@Takuya_Miyai