getSubContainerDataUpdates
abstract fun getSubContainerDataUpdates(panelContainerViewModel: PanelContainerViewModel<CD, VM, SD>): Collection<StateDrivenSubContainerController.SubContainerDataUpdate<VM, SD>>
Updates the panel sub-container data associated to the existing panel sub-container view models.
If the returned collection doesn't contain an entry for the panel sub-container, its removal is initiated.
Called whenever panelContainerViewModel is changed. PanelSubContainerViewModels can trigger a panelContainerViewModel change by changing a property that uses the PanelSubContainerViewModel.mutableExtraState delegate.