OpenSAML user discussion

Hi does anyone know how to add Extensions to an AuthnRequest?

I have come across a couple of problems

1. The Extensions interface does not define a QName DEFAULT_ELEMENT_NAME. 
Although I worked out what it should be so that I could get an instance of an 
ExtensionsBuilder and an Extension. 

2. However now I can’t work out how to add an XMLObject to the Extension. If 
I specify the extensions as the parent of the XMLObject when I marshal and 
serialize it, the XMLObject is not present. 

Thanks
 
Matthew Webb