code: def extensionResponse(self, namespace_uri, require_signed):
          
          if require_signed:
              return self.getSignedNS(namespace_uri)
          else:
              return self.message.getArgs(namespace_uri)
docs: 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.