Throw IllegalStateException on subsequent calls of initializeComponents()

[bruno . borges]

Shouldn't wicket throw an IllegalStateException on subsequente calls of  
Application.initializeComponents().

Afterall,
/**
* THIS METHOD IS NOT PART OF THE WICKET PUBLIC API. DO NOT CALL.
*
* Initializes wicket components.
*/
public final void initializeComponents() { ... }

Is there any reason to not throw this exception? Or simply, return if it is  
been called a second time, giving a warning.

cheers
Bruno