IXmlDeclaration
using System.Runtime.CompilerServices;
namespace Newtonsoft.Json.Converters
{
    [System.Runtime.CompilerServices.NullableContext(2)]
    internal interface IXmlDeclaration : IXmlNode
    {
        string Version { get; }
        string Encoding { get; set; }
        string Standalone { get; set; }
    }
}