'Return response arguments in the specified namespace.
@param namespace_uri: The namespace URI of the arguments to be
returned.
@param require_signed: True if the arguments should be among
those signed in the response, False if you don\'t care.
If require_signed is True and the arguments are not signed,
return None.'

def extensionResponse(self, namespace_uri, require_signed):

    if require_signed:
        return self.getSignedNS(namespace_uri)
    else:
        return self.message.getArgs(namespace_uri)
