code: func (r *ChainResource) GetByIDs(ctx smolder.APIContext, request *restful.Request, response *restful.Response, ids []string) {
  	resp := ChainResponse{}
  	resp.Init(ctx)
  
  	for _, id := range ids {
  		chain := bees.GetChain(id)
  		if chain == nil {
  			r.NotFound(request, response)
  			return
  		}
  
  		resp.AddChain(*chain)
  	}
  
  	resp.Send(response)
  }
docs: // GetByIDs sends out all items matching a set of IDs