System.Linq.CachedReflectionInfo.DefaultIfEmpty_TSource_1 C# (CSharp) Метод

        public static MethodInfo DefaultIfEmpty_TSource_1(Type TSource) =>
             (s_DefaultIfEmpty_TSource_1 ??
             (s_DefaultIfEmpty_TSource_1 = new Func<IQueryable<object>, IQueryable<object>>(Queryable.DefaultIfEmpty).GetMethodInfo().GetGenericMethodDefinition()))
              .MakeGenericMethod(TSource);