code: func (s *ConfigService) GetSummary(opt *SummaryOptions) (*SummaryInfo, *Response, error) {
  	u := "config/server/summary"
  
  	u, err := addOptions(u, opt)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	req, err := s.client.NewRequest("GET", u, nil)
  	if err != nil {
  		return nil, nil, err
  	}
  
  	v := new(SummaryInfo)
  	resp, err := s.client.Do(req, v)
  	if err != nil {
  		return nil, resp, err
  	}
  
  	return v, resp, err
  }
docs: // GetSummary retrieves a summary of the current server state.
  // The caller must be a member of a group that is granted the Administrate Server capability.
  //
  // Gerrit API docs: https://gerrit-review.googlesource.com/Documentation/rest-api-config.html#get-summary