Set the visibility timeout for the queue.

        :type visibility_timeout: int
        :param visibility_timeout: The desired timeout in seconds

def set_timeout(self, visibility_timeout):
        """
        Set the visibility timeout for the queue.

        :type visibility_timeout: int
        :param visibility_timeout: The desired timeout in seconds
        """
        retval = self.set_attribute('VisibilityTimeout', visibility_timeout)
        if retval:
            self.visibility_timeout = visibility_timeout
        return retval