def find_loopbacks(self):
        """Finds all loopbacks originating from :attr:`orig_re_pattern`.

        Generator yields device names
        """

        for dev, source in self.loopbacks.items():
            if re.match(self.orig_re_pattern, source):
                yield dev
Finds all loopbacks originating from :attr:`orig_re_pattern`.

        Generator yields device names