code: func (fis FileInfoSums) GetAllFile(name string) FileInfoSums {
  	f := FileInfoSums{}
  	for i := range fis {
  		if fis[i].Name() == name {
  			f = append(f, fis[i])
  		}
  	}
  	return f
  }
docs: // GetAllFile returns a FileInfoSums with all matching names.