<PackageReference Include="NJsonSchema.Annotations" Version="11.5.1" />

System.Diagnostics.CodeAnalysis.ExperimentalAttribute

Indicates that an API is experimental and it may change in the future.
namespace System.Diagnostics.CodeAnalysis { internal sealed class ExperimentalAttribute : Attribute { public string DiagnosticId { get; } public string UrlFormat { get; set; } public ExperimentalAttribute(string diagnosticId); } }