def sync(self):
        """
        execute the steps required to have the
        feature end with the desired state.
        """
        phase = _get_phase(self._formula_instance)
        self.logger.info("%s %s..." % (phase.verb.capitalize(), self.feature_name))
        message = "...finished %s %s." % (phase.verb, self.feature_name)
        result = getattr(self, phase.name)()
        if result or phase in (PHASE.INSTALL, PHASE.REMOVE):
            self.logger.info(message)
        else:
            self.logger.debug(message)
        return result
execute the steps required to have the
        feature end with the desired state.