def clear_conditions(self, *conkeys, **noclear):
        """Clear conditions.

        Clear only the conditions conkeys if specified. Clear only the
        conditions not specified by conkeys if noclear is True (False
        default).

        .. note::
           Updates the mask if not no_auto.
        """

        offenders = set(conkeys) - set(self.conconf.conditions.keys())
        if offenders:
            raise KeyError(', '.join([off for off in offenders]))

        # Valid keywords subtracted
        offenders = set(noclear) - set({'noclear'})
        if offenders:
            raise KeyError(', '.join([off for off in offenders]))

        noclear = noclear.get('noclear', False)

        for ck in self.conconf.conditions:
            if not conkeys:
                # self.conconf.set_condition(ck, None)
                self.conconf.reset()
                break
            elif not noclear and ck in conkeys:
                self.conconf.set_condition(ck, None)
            elif noclear and ck not in conkeys:
                self.conconf.set_condition(ck, None)

        if not self.no_auto:
            self.make_mask()
Clear conditions.

        Clear only the conditions conkeys if specified. Clear only the
        conditions not specified by conkeys if noclear is True (False
        default).

        .. note::
           Updates the mask if not no_auto.