Linux Mac OSX Windows 
 Implement nsIXPTLoaderSink if you want to enumerate the entries in
 an XPT archive of some kind
[scriptable, uuid(6e48c500-8682-4730-add6-7db693b9e7ba)]
interface nsIXPTLoaderSink : nsISupports

Methods

 called by the loader for each entry in the archive
 @param itemName the name of this particular item in the archive
 @param index the index of the item inthe archive
 @param stream contains the contents of the xpt file
void foundEntry(in string itemName, in long index, in nsIInputStream xptData)