EnumOptions
                    public sealed class EnumOptions : IExtendableMessage<EnumOptions>, IMessage<EnumOptions>, IMessage, IEquatable<EnumOptions>, IDeepCloneable<EnumOptions>, IBufferMessage
                
                
public EnumOptions()
public RepeatedField<TValue> GetOrInitializeExtension<TValue>(RepeatedExtension<EnumOptions, TValue> extension)