code: func (args Args) Get(key string) []string {
  	values := args.fields[key]
  	if values == nil {
  		return make([]string, 0)
  	}
  	slice := make([]string, 0, len(values))
  	for key := range values {
  		slice = append(slice, key)
  	}
  	return slice
  }
docs: // Get returns the list of values associated with the key