broadcastData
Publishes data on this screen's own broadcast channel, via screenBehaviorsHolder — the mechanism behind ScrollColumnTile/ScrollRowTile/ScrollPagerTile and the overlay open/close/dismiss commands (DisplayNavigationDrawer, DisplaySnackbar, and their dismiss/close counterparts), all of which are fire-and-forget commands addressed to a tile id or to "whatever is listening on this screen" rather than a direct tile-tree mutation.
Parameters
data
the broadcast payload to publish.