code: func (p *Client) DiscoverIncludedServices(ss []ble.UUID, s *ble.Service) ([]*ble.Service, error) {
  	p.Lock()
  	defer p.Unlock()
  	return nil, nil
  }
docs: // DiscoverIncludedServices finds the included services of a service. [Vol 3, Part G, 4.5.1]
  // If filter is specified, only filtered services are returned.