findPanelFragmentContainerAndSetId
fun <VM : PanelSubContainerViewModel<SD>, SD> PanelContainerElementHolder.SubContainerHolder<VM, SD>.findPanelFragmentContainerAndSetId(panelFragmentContainerId: PanelFragmentContainerId, @IdRes stubId: Int? = null): PanelFragmentContainerHolder
Returns a PanelFragmentContainerHolder referencing the first matching FragmentContainerView in this panel sub-container. A FragmentContainerView is considered a match if its view ID matches the stubId. If stubId is null any FragmentContainerView matches.
If no FragmentContainerView is found the sub-container view is referenced.
The panelFragmentContainerId is set as view id to the referenced view.