ReadonlyfgFinal gravity band, as specific gravity. null when the style doesn't give one.
ReadonlyibuBitterness band, in IBU. null when the style doesn't give one.
ReadonlyogOriginal gravity band, as specific gravity. null when the style doesn't give one.
ReadonlysrmColor band, in SRM. null when the style doesn't give one.
The style's published bands, as much of them as the caller has.