def removeAll(self):
        """
        Remove all selectables, and return a list of them.
        """
        return self._removeAll(
            [self._selectables[fd] for fd in self._reads],
            [self._selectables[fd] for fd in self._writes])

        Remove all selectables, and return a list of them.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/internet/pollreactor.py