Minor Description
If you create a non-panel component with PanelMarkupSourcingStrategy(true), and provide the html:
<!doctype html>
<html xmlns:wicket="http://wicket.apache.org">
<wicket:panel>
// MY CODE
</wicket:panel>
</html>
You get an error: "Unknown tag name with Wicket namespace: 'panel'"
In org.apache.wicket.markup.html.panel.Panel the static code "WicketTagIdentifier.registerWellKnownTagName(PANEL);" will register wicket:panel,
so you only get this if you add the non-panel component before your first panel.