// This is a very special extension - it allows adding a child using fluent style and switches the current chaining object to the child
// behind the scenes the parent start is immediately output and the child ends the parent when it ends (so that the while hierarchy gets output)
public static ComponentWrapper <TConfig, TTag> WithChild <TConfig, TTag>(this ComponentBuilder <TConfig, TTag> builder)
where TConfig : BootstrapConfig
where TTag : Tag
{
ComponentWrapper <TConfig, TTag> wrapper = builder.Begin();
wrapper.WithChild = true;
return(wrapper);
}