[Fedora-suds-list] Unable to modify text in plugin

[Devin Venable]

The plugin documentation and source indicates that the end user will be able
to modify the text sent to sending.

 def sending(self, context):
        """
        Suds will send the specified soap envelope.
        Provides the plugin with the opportunity to inspect/modify
        the message text it is sent.
        @param context: The send context.
            The I{envelope} is the envelope text.
        @type context: L{MessageContext}
        """
        pass


Setting context.envelope = 'something else' has no effect on the sent
string.  Is this a bug?