code: func (m *MemoryManager) Create(policy Policy) error {
  	m.Lock()
  	defer m.Unlock()
  
  	if _, found := m.Policies[policy.GetID()]; found {
  		return errors.New("Policy exists")
  	}
  
  	m.Policies[policy.GetID()] = policy
  	return nil
  }
docs: // Create a new pollicy to MemoryManager.