Returns a list of the collectors for this instance.

        :return     {<str> name: <orb.Collector>, ..}

def collectors(self, recurse=True, flags=0):
        """
        Returns a list of the collectors for this instance.

        :return     {<str> name: <orb.Collector>, ..}
        """
        output = {}
        if recurse and self.inherits():
            schema = orb.system.schema(self.inherits())
            if not schema:
                raise orb.errors.ModelNotFound(schema=self.inherits())
            else:
                iflags = (flags & ~orb.Collector.Flags.Virtual) if flags else ~orb.Collector.Flags.Virtual
                output.update(schema.collectors(recurse=recurse, flags=iflags))
        output.update({c.name(): c for c in self.__collectors.values() if not flags or c.testFlag(flags)})
        return output