code: func (r *ChainResponse) EmptyResponse() interface{} {
  	if len(r.chains) == 0 {
  		var out struct {
  			Chains interface{} `json:"chains"`
  		}
  		out.Chains = []chainInfoResponse{}
  		return out
  	}
  	return nil
  }
docs: // EmptyResponse returns an empty API response for this endpoint if there's no data to respond with