public static MethodInfo GroupBy_TSource_TKey_3(Type TSource, Type TKey) =>
(s_GroupBy_TSource_TKey_3 ??
(s_GroupBy_TSource_TKey_3 = new Func<IQueryable<object>, Expression<Func<object, object>>, IEqualityComparer<object>, IQueryable<IGrouping<object, object>>>(Queryable.GroupBy).GetMethodInfo().GetGenericMethodDefinition()))
.MakeGenericMethod(TSource, TKey);