public MessageDescriptorBuilder <T> DoublePackedArray(int fieldNum, Func <T, IEnumerable <double> > valueGetter, Action <T, double> oneValueSetter, Func <T, bool> hasValueFunc = null, bool canReadUnpacked = true)
{
return(Add(FieldSetting <T> .CreateDoublePackedArray(fieldNum, valueGetter, oneValueSetter, hasValueFunc, canReadUnpacked)));
}