internal bool IsExtensionsInitialized(IMessage message)
        {
            if (Proto.ExtensionRange.Count == 0)
            {
                return(true);
            }

            if (extensionSetIsInitialized == null)
            {
                extensionSetIsInitialized = ReflectionUtil.CreateIsInitializedCaller(ClrType);
            }

            return(extensionSetIsInitialized(message));
        }