namespace Microsoft.EntityFrameworkCore
{
    public abstract class ModelBuilding101TestBase
    {
        protected class OneToManyOptionalWithCompositeKeyNrt
        {
            public class ContextAnnotated0 : Context101
            {
                [PrimaryKey("Id1", new[] { "Id2" })]
                public class Blog
                {
                    public ICollection<Post!>! Posts { get; }
                }
            }
        }
    }
}