RegisterInitializer() not in IContainer

[znakeeye]

Working with Prism.DryIoc and Prism.DryIoc.Extensions I want to register an initializer for all objects. However, the IContainer interface does not have the RegisterInitializer() method. Is this intended or can it be improved?

public override void RegisterTypes(IContainerRegistry containerRegistry)
{
    IContainer container = containerRegistry.GetContainer();
    container.RegisterInitializer(...); // No good :(
    // ...
}

[dadhi]

In v5+ RegisterInitializer is defined as extension method for IRegistrator which is implemented by IContainer, so it should be available.