runtime/CSharp/src/Misc/NullableAttribute.cs

/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
 * Use of this file is governed by the BSD 3-clause license that
 * can be found in the LICENSE.txt file in the project root.
 */
namespace Antlr4.Runtime.Misc
{
    using System;

    [AttributeUsage(AttributeTargets.Field | AttributeTargets.Parameter | AttributeTargets.ReturnValue | AttributeTargets.Property, Inherited = true, AllowMultiple = false)]
    public sealed class NullableAttribute : Attribute
    {
    }
}