<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 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