properties property
Implementation
@override
Map<String, Object?> get properties => {
// Every family stamps `display_style` on its Viewed event and nowhere
// else; the backend column is non-nullable and falls back to an empty
// string, so omitting it would leave every PiP row unsegmentable by
// display style. A PiP has one style, so it is a constant.
'display_style': 'pip',
..._nonNull({'screen_name': screenName}),
};