code: func (artifacts Artifacts) GroupByPlatform() map[string][]Artifact {
  	var result = map[string][]Artifact{}
  	for _, a := range artifacts.items {
  		plat := a.Goos + a.Goarch + a.Goarm
  		result[plat] = append(result[plat], a)
  	}
  	return result
  }
docs: // GroupByPlatform groups the artifacts by their platform