static public SpectrumBand <T> LookupFirst <T>(this SpectrumLookup <T> item, float value) { return(item.Lookup(value).GetFirst()); }
static public IEnumerable <T> LookupData <T>(this SpectrumLookup <T> item, float value) { return(item.Lookup(value).Convert(b => b.GetData())); }