public MessageDescriptorBuilder <T> EnumArray <E>(int fieldNum, Func <T, IEnumerable <E> > valueGetter, Action <T, E> oneValueSetter, Func <T, bool> hasValueFunc = null, bool canReadPacked = true)
 {
     return(Add(FieldSetting <T> .CreateEnumArray <E>(fieldNum, valueGetter, oneValueSetter, hasValueFunc, canReadPacked)));
 }