def unpause(self):
        """
        Process all callbacks made since L{pause}() was called.
        """
        self.paused = self.paused - 1
        if self.paused:
            return
        if self.called:
            self._runCallbacks()

        Process all callbacks made since L{pause}() was called.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/defer.py