code: func (m *Manager) Stop() {
  	m.mtx.Lock()
  	defer m.mtx.Unlock()
  
  	level.Info(m.logger).Log("msg", "Stopping rule manager...")
  
  	for _, eg := range m.groups {
  		eg.stop()
  	}
  
  	level.Info(m.logger).Log("msg", "Rule manager stopped")
  }
docs: // Stop the rule manager's rule evaluation cycles.