<PackageReference Include="NJsonSchema.Annotations" Version="11.3.0" />

System.Diagnostics.CodeAnalysis.SetsRequiredMembersAttribute

Specifies that this constructor sets all required members for the current type, and callers do not need to set any required members themselves.
namespace System.Diagnostics.CodeAnalysis { internal sealed class SetsRequiredMembersAttribute : Attribute { public SetsRequiredMembersAttribute(); } }