code: func NewVolumeFormat(source string, quiet bool) Format {
  	switch source {
  	case TableFormatKey:
  		if quiet {
  			return defaultVolumeQuietFormat
  		}
  		return defaultVolumeTableFormat
  	case RawFormatKey:
  		if quiet {
  			return `name: {{.Name}}`
  		}
  		return `name: {{.Name}}\ndriver: {{.Driver}}\n`
  	}
  	return Format(source)
  }
docs: // NewVolumeFormat returns a format for use with a volume Context