nsIWebServiceProxyCreationListener in Firefox 1.5

 Invoked if an error occurs during web service proxy
 initialization. This error code be a result of attempting
 to load the specified WSDL URL or a result of processing
 the WSDL and creating the interface information for the 
 proxy.

 @param error The exception generated as a result of the
                  error. This object can be introspected
                  for further information.

 This interface should be implemented by a user who creates
 a web service proxy in an asynchronous manner. An instance
 of this interface is passed into the <code>initAsync</code>
 method of the proxy.


 Invoked when the proxy is completely initialized. Method
 calls on the proxy can be made once this method is called.
 
 @param proxy The initialized web service proxy